diff --git a/.gitignore b/.gitignore
index b358cc8..f6fef45 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@ node_modules/
 
 # dotenv environment variables file
 .env.development
+.env.staging
 .env.production
 *.env
 
diff --git a/config/config.js b/config/config.js
index 45a5ca5..2bfe622 100644
--- a/config/config.js
+++ b/config/config.js
@@ -6,6 +6,13 @@ module.exports = {
     "database": process.env.DB_NAME, // local PostgreSQL DB name
     "dialect": "postgres"
   },
+  "staging": {
+    "use_env_variable": "DB_URL", // staging database connection string
+    "dialect": "postgres",
+    "dialectOptions": {
+      "ssl": true,
+    },
+  },
   "production": {
     "use_env_variable": "DB_URL", // production database connection string
     "dialect": "postgres",
diff --git a/index.js b/index.js
index dde9fa0..0054468 100644
--- a/index.js
+++ b/index.js
@@ -1,4 +1,4 @@
-require("dotenv-flow").config();7
+require("dotenv-flow").config();
 
 const express = require("express");
 const cors = require("cors");
diff --git a/package-lock.json b/package-lock.json
index 26f23c4..6459ebc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -87,14 +87,14 @@
       "integrity": "sha512-iiUgKzV9AuaEkZqkOLDIvlQiL6ltuZd9tGcW3gwpnX8JbuiuhFlEGmmFXEXkN50Cvq7Os88IY2v0dkDqXYWVgA=="
     },
     "node_modules/@types/node": {
-      "version": "14.18.31",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.18.31.tgz",
-      "integrity": "sha512-vQAnaReSQkEDa8uwAyQby8bYGKu84R/deEc6mg5T8fX6gzCn8QW6rziSgsti1fNvsrswKUKPnVTi7uoB+u62Mw=="
+      "version": "14.18.32",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.18.32.tgz",
+      "integrity": "sha512-Y6S38pFr04yb13qqHf8uk1nHE3lXgQ30WZbv1mLliV9pt0NjvqdWttLcrOYLnXbOafknVYRHZGoMSpR9UwfYow=="
     },
     "node_modules/@types/validator": {
-      "version": "13.7.7",
-      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.7.tgz",
-      "integrity": "sha512-jiEw2kTUJ8Jsh4A1K4b5Pkjj9Xz6FktLLOQ36ZVLRkmxFbpTvAV2VRoKMojz8UlZxNg/2dZqzpigH4JYn1bkQg=="
+      "version": "13.7.9",
+      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.9.tgz",
+      "integrity": "sha512-y5KJ1PjGXPpU4CZ7lThDu31s+FqvzhqwMOR6Go/x6xaQMFjgzwfzfOvCwABsylr/5n8sB1qFQm1Vi7TaCB8P+A=="
     },
     "node_modules/abbrev": {
       "version": "1.1.1",
@@ -210,9 +210,9 @@
       "dev": true
     },
     "node_modules/body-parser": {
-      "version": "1.20.0",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.0.tgz",
-      "integrity": "sha512-DfJ+q6EPcGKZD1QWUjSpqp+Q7bDQTsQIF4zfUAtZ6qk+H/3/QRhg9CEp39ss+/T2vw0+HaidC0ecJj/DRLIaKg==",
+      "version": "1.20.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
+      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
       "dependencies": {
         "bytes": "3.1.2",
         "content-type": "~1.0.4",
@@ -222,7 +222,7 @@
         "http-errors": "2.0.0",
         "iconv-lite": "0.4.24",
         "on-finished": "2.4.1",
-        "qs": "6.10.3",
+        "qs": "6.11.0",
         "raw-body": "2.5.1",
         "type-is": "~1.6.18",
         "unpipe": "1.0.0"
@@ -569,22 +569,6 @@
         "editorconfig": "bin/editorconfig"
       }
     },
-    "node_modules/editorconfig/node_modules/lru-cache": {
-      "version": "4.1.5",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",
-      "integrity": "sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==",
-      "dev": true,
-      "dependencies": {
-        "pseudomap": "^1.0.2",
-        "yallist": "^2.1.2"
-      }
-    },
-    "node_modules/editorconfig/node_modules/yallist": {
-      "version": "2.1.2",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
-      "integrity": "sha512-ncTzHV7NvsQZkYe1DW7cbDLm0YpzHmZF5r/iyP3ZnQtMiJ+pjzisCiMNI+Sj+xQF5pXhSHxSB3uDbsBTzY/c2A==",
-      "dev": true
-    },
     "node_modules/ee-first": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/ee-first/-/ee-first-1.1.1.tgz",
@@ -690,13 +674,13 @@
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     },
     "node_modules/express": {
-      "version": "4.18.1",
-      "resolved": "https://registry.npmjs.org/express/-/express-4.18.1.tgz",
-      "integrity": "sha512-zZBcOX9TfehHQhtupq57OF8lFZ3UZi08Y97dwFCkD8p9d/d2Y3M+ykKcwaMDEL+4qyUolgBDX6AblpR3fL212Q==",
+      "version": "4.18.2",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.18.2.tgz",
+      "integrity": "sha512-5/PsL6iGPdfQ/lKM1UuielYgv3BUoJfz1aUwU9vHZ+J7gyvwdQXFEBIEIaxeGf0GIcreATNyBExtalisDbuMqQ==",
       "dependencies": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
-        "body-parser": "1.20.0",
+        "body-parser": "1.20.1",
         "content-disposition": "0.5.4",
         "content-type": "~1.0.4",
         "cookie": "0.5.0",
@@ -715,7 +699,7 @@
         "parseurl": "~1.3.3",
         "path-to-regexp": "0.1.7",
         "proxy-addr": "~2.0.7",
-        "qs": "6.10.3",
+        "qs": "6.11.0",
         "range-parser": "~1.2.1",
         "safe-buffer": "5.2.1",
         "send": "0.18.0",
@@ -1070,9 +1054,9 @@
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-      "version": "2.10.0",
-      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.10.0.tgz",
-      "integrity": "sha512-Erxj2n/LDAZ7H8WNJXd9tw38GYM3dv8rk8Zcs+jJuxYTW7sozH+SS8NtrSjVL1/vpLvWi1hxy96IzjJ3EHTJJg==",
+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.11.0.tgz",
+      "integrity": "sha512-RRjxlvLDkD1YJwDbroBHMb+cukurkDWNyHx7D3oNB5x9rb5ogcksMC5wHCadcXoo67gVr/+3GFySh3134zi6rw==",
       "dev": true,
       "dependencies": {
         "has": "^1.0.3"
@@ -1144,9 +1128,9 @@
       "dev": true
     },
     "node_modules/js-beautify": {
-      "version": "1.14.6",
-      "resolved": "https://registry.npmjs.org/js-beautify/-/js-beautify-1.14.6.tgz",
-      "integrity": "sha512-GfofQY5zDp+cuHc+gsEXKPpNw2KbPddreEo35O6jT6i0RVK6LhsoYBhq5TvK4/n74wnA0QbK8gGd+jUZwTMKJw==",
+      "version": "1.14.7",
+      "resolved": "https://registry.npmjs.org/js-beautify/-/js-beautify-1.14.7.tgz",
+      "integrity": "sha512-5SOX1KXPFKx+5f6ZrPsIPEY7NwKeQz47n3jm2i+XeHx9MoRsfQenlOP13FQhWvg8JRS0+XLO6XYUQ2GX+q+T9A==",
       "dev": true,
       "dependencies": {
         "config-chain": "^1.1.13",
@@ -1318,14 +1302,13 @@
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     },
     "node_modules/lru-cache": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
-      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",
+      "integrity": "sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==",
+      "dev": true,
       "dependencies": {
-        "yallist": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=10"
+        "pseudomap": "^1.0.2",
+        "yallist": "^2.1.2"
       }
     },
     "node_modules/lru-queue": {
@@ -1425,9 +1408,9 @@
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     "node_modules/moment-timezone": {
-      "version": "0.5.37",
-      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.37.tgz",
-      "integrity": "sha512-uEDzDNFhfaywRl+vwXxffjjq1q0Vzr+fcQpQ1bU0kbzorfS7zVtZnCnGc8mhWmF39d4g4YriF6kwA75mJKE/Zg==",
+      "version": "0.5.38",
+      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.38.tgz",
+      "integrity": "sha512-nMIrzGah4+oYZPflDvLZUgoVUO4fvAqHstvG3xAUnMolWncuAiLDWNnJZj6EwJGMGfb1ZcuTFE6GI3hNOVWI/Q==",
       "dependencies": {
         "moment": ">= 2.9.0"
       },
@@ -1777,9 +1760,9 @@
       "dev": true
     },
     "node_modules/qs": {
-      "version": "6.10.3",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.10.3.tgz",
-      "integrity": "sha512-wr7M2E0OFRfIfJZjKGieI8lBKb7fRCH4Fv5KNPEs7gJ8jadvotdsS08PzOKR7opXhZ/Xkjtt3WF9g38drmyRqQ==",
+      "version": "6.11.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
+      "integrity": "sha512-MvjoMCJwEarSbUYk5O+nmoSzSutSsTwF85zcHPQ9OrlFoZOYIjaqBAJIqIXjptyD5vThxGq52Xu/MaJzRkIk4Q==",
       "dependencies": {
         "side-channel": "^1.0.4"
       },
@@ -1888,9 +1871,9 @@
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-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/safe-stable-stringify/-/safe-stable-stringify-2.4.0.tgz",
-      "integrity": "sha512-eehKHKpab6E741ud7ZIMcXhKcP6TSIezPkNZhy5U8xC6+VvrRdUA2tMgxGxaGl4cz7c2Ew5+mg5+wNB16KQqrA==",
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/safe-stable-stringify/-/safe-stable-stringify-2.4.1.tgz",
+      "integrity": "sha512-dVHE6bMtS/bnL2mwualjc6IxEv1F+OCUpA46pKUj6F8uDbUM0jCCulPqRNPSnWwGNKx5etqMjZYdXtrm5KJZGA==",
       "engines": {
         "node": ">=10"
       }
@@ -1937,9 +1920,9 @@
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     },
     "node_modules/sequelize": {
-      "version": "6.24.0",
-      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-6.24.0.tgz",
-      "integrity": "sha512-mPo7Q7gWkrsstjR2aw8ahkrj8RUJCozz3kedAz2B5ZIdLoQEH1z2tvaeJONI8R6RqeuyRQosx9Yn3s9yQyo6lQ==",
+      "version": "6.25.3",
+      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-6.25.3.tgz",
+      "integrity": "sha512-sbbvDGft6UfSRdIC0dcZvMxxJYi6g0+IgWvIpTuk6ccEoIyLcr7Sk6nXWwGfkdlDabGeunhhhI4yH8PleVMvtw==",
       "funding": [
         {
           "type": "opencollective",
@@ -2043,6 +2026,17 @@
         }
       }
     },
+    "node_modules/sequelize/node_modules/lru-cache": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+      "dependencies": {
+        "yallist": "^4.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/sequelize/node_modules/ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -2062,6 +2056,11 @@
         "node": ">=10"
       }
     },
+    "node_modules/sequelize/node_modules/yallist": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+    },
     "node_modules/serve-static": {
       "version": "1.15.0",
       "resolved": "https://registry.npmjs.org/serve-static/-/serve-static-1.15.0.tgz",
@@ -2511,9 +2510,10 @@
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-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
+      "integrity": "sha512-ncTzHV7NvsQZkYe1DW7cbDLm0YpzHmZF5r/iyP3ZnQtMiJ+pjzisCiMNI+Sj+xQF5pXhSHxSB3uDbsBTzY/c2A==",
+      "dev": true
     },
     "node_modules/yargs": {
       "version": "16.2.0",
@@ -2600,14 +2600,14 @@
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-      "version": "14.18.31",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.18.31.tgz",
-      "integrity": "sha512-vQAnaReSQkEDa8uwAyQby8bYGKu84R/deEc6mg5T8fX6gzCn8QW6rziSgsti1fNvsrswKUKPnVTi7uoB+u62Mw=="
+      "version": "14.18.32",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-14.18.32.tgz",
+      "integrity": "sha512-Y6S38pFr04yb13qqHf8uk1nHE3lXgQ30WZbv1mLliV9pt0NjvqdWttLcrOYLnXbOafknVYRHZGoMSpR9UwfYow=="
     },
     "@types/validator": {
-      "version": "13.7.7",
-      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.7.tgz",
-      "integrity": "sha512-jiEw2kTUJ8Jsh4A1K4b5Pkjj9Xz6FktLLOQ36ZVLRkmxFbpTvAV2VRoKMojz8UlZxNg/2dZqzpigH4JYn1bkQg=="
+      "version": "13.7.9",
+      "resolved": "https://registry.npmjs.org/@types/validator/-/validator-13.7.9.tgz",
+      "integrity": "sha512-y5KJ1PjGXPpU4CZ7lThDu31s+FqvzhqwMOR6Go/x6xaQMFjgzwfzfOvCwABsylr/5n8sB1qFQm1Vi7TaCB8P+A=="
     },
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@@ -2701,9 +2701,9 @@
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-      "version": "1.20.0",
-      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.0.tgz",
-      "integrity": "sha512-DfJ+q6EPcGKZD1QWUjSpqp+Q7bDQTsQIF4zfUAtZ6qk+H/3/QRhg9CEp39ss+/T2vw0+HaidC0ecJj/DRLIaKg==",
+      "version": "1.20.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
+      "integrity": "sha512-jWi7abTbYwajOytWCQc37VulmWiRae5RyTpaCyDcS5/lMdtwSz5lOpDE67srw/HYe35f1z3fDQw+3txg7gNtWw==",
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         "content-type": "~1.0.4",
@@ -2713,7 +2713,7 @@
         "http-errors": "2.0.0",
         "iconv-lite": "0.4.24",
         "on-finished": "2.4.1",
-        "qs": "6.10.3",
+        "qs": "6.11.0",
         "raw-body": "2.5.1",
         "type-is": "~1.6.18",
         "unpipe": "1.0.0"
@@ -2988,24 +2988,6 @@
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-          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",
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-          "dev": true,
-          "requires": {
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-            "yallist": "^2.1.2"
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-          "dev": true
-        }
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@@ -3100,13 +3082,13 @@
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     "express": {
-      "version": "4.18.1",
-      "resolved": "https://registry.npmjs.org/express/-/express-4.18.1.tgz",
-      "integrity": "sha512-zZBcOX9TfehHQhtupq57OF8lFZ3UZi08Y97dwFCkD8p9d/d2Y3M+ykKcwaMDEL+4qyUolgBDX6AblpR3fL212Q==",
+      "version": "4.18.2",
+      "resolved": "https://registry.npmjs.org/express/-/express-4.18.2.tgz",
+      "integrity": "sha512-5/PsL6iGPdfQ/lKM1UuielYgv3BUoJfz1aUwU9vHZ+J7gyvwdQXFEBIEIaxeGf0GIcreATNyBExtalisDbuMqQ==",
       "requires": {
         "accepts": "~1.3.8",
         "array-flatten": "1.1.1",
-        "body-parser": "1.20.0",
+        "body-parser": "1.20.1",
         "content-disposition": "0.5.4",
         "content-type": "~1.0.4",
         "cookie": "0.5.0",
@@ -3125,7 +3107,7 @@
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         "proxy-addr": "~2.0.7",
-        "qs": "6.10.3",
+        "qs": "6.11.0",
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         "send": "0.18.0",
@@ -3405,9 +3387,9 @@
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-      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.10.0.tgz",
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+      "version": "2.11.0",
+      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.11.0.tgz",
+      "integrity": "sha512-RRjxlvLDkD1YJwDbroBHMb+cukurkDWNyHx7D3oNB5x9rb5ogcksMC5wHCadcXoo67gVr/+3GFySh3134zi6rw==",
       "dev": true,
       "requires": {
         "has": "^1.0.3"
@@ -3458,9 +3440,9 @@
       "dev": true
     },
     "js-beautify": {
-      "version": "1.14.6",
-      "resolved": "https://registry.npmjs.org/js-beautify/-/js-beautify-1.14.6.tgz",
-      "integrity": "sha512-GfofQY5zDp+cuHc+gsEXKPpNw2KbPddreEo35O6jT6i0RVK6LhsoYBhq5TvK4/n74wnA0QbK8gGd+jUZwTMKJw==",
+      "version": "1.14.7",
+      "resolved": "https://registry.npmjs.org/js-beautify/-/js-beautify-1.14.7.tgz",
+      "integrity": "sha512-5SOX1KXPFKx+5f6ZrPsIPEY7NwKeQz47n3jm2i+XeHx9MoRsfQenlOP13FQhWvg8JRS0+XLO6XYUQ2GX+q+T9A==",
       "dev": true,
       "requires": {
         "config-chain": "^1.1.13",
@@ -3622,11 +3604,13 @@
       }
     },
     "lru-cache": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
-      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.5.tgz",
+      "integrity": "sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==",
+      "dev": true,
       "requires": {
-        "yallist": "^4.0.0"
+        "pseudomap": "^1.0.2",
+        "yallist": "^2.1.2"
       }
     },
     "lru-queue": {
@@ -3702,9 +3686,9 @@
       "integrity": "sha512-5LC9SOxjSc2HF6vO2CyuTDNivEdoz2IvyJJGj6X8DJ0eFyfszE0QiEd+iXmBvUP3WHxSjFH/vIsA0EN00cgr8w=="
     },
     "moment-timezone": {
-      "version": "0.5.37",
-      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.37.tgz",
-      "integrity": "sha512-uEDzDNFhfaywRl+vwXxffjjq1q0Vzr+fcQpQ1bU0kbzorfS7zVtZnCnGc8mhWmF39d4g4YriF6kwA75mJKE/Zg==",
+      "version": "0.5.38",
+      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.38.tgz",
+      "integrity": "sha512-nMIrzGah4+oYZPflDvLZUgoVUO4fvAqHstvG3xAUnMolWncuAiLDWNnJZj6EwJGMGfb1ZcuTFE6GI3hNOVWI/Q==",
       "requires": {
         "moment": ">= 2.9.0"
       }
@@ -3962,9 +3946,9 @@
       "dev": true
     },
     "qs": {
-      "version": "6.10.3",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.10.3.tgz",
-      "integrity": "sha512-wr7M2E0OFRfIfJZjKGieI8lBKb7fRCH4Fv5KNPEs7gJ8jadvotdsS08PzOKR7opXhZ/Xkjtt3WF9g38drmyRqQ==",
+      "version": "6.11.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
+      "integrity": "sha512-MvjoMCJwEarSbUYk5O+nmoSzSutSsTwF85zcHPQ9OrlFoZOYIjaqBAJIqIXjptyD5vThxGq52Xu/MaJzRkIk4Q==",
       "requires": {
         "side-channel": "^1.0.4"
       }
@@ -4032,9 +4016,9 @@
       "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="
     },
     "safe-stable-stringify": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/safe-stable-stringify/-/safe-stable-stringify-2.4.0.tgz",
-      "integrity": "sha512-eehKHKpab6E741ud7ZIMcXhKcP6TSIezPkNZhy5U8xC6+VvrRdUA2tMgxGxaGl4cz7c2Ew5+mg5+wNB16KQqrA=="
+      "version": "2.4.1",
+      "resolved": "https://registry.npmjs.org/safe-stable-stringify/-/safe-stable-stringify-2.4.1.tgz",
+      "integrity": "sha512-dVHE6bMtS/bnL2mwualjc6IxEv1F+OCUpA46pKUj6F8uDbUM0jCCulPqRNPSnWwGNKx5etqMjZYdXtrm5KJZGA=="
     },
     "safer-buffer": {
       "version": "2.1.2",
@@ -4074,9 +4058,9 @@
       }
     },
     "sequelize": {
-      "version": "6.24.0",
-      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-6.24.0.tgz",
-      "integrity": "sha512-mPo7Q7gWkrsstjR2aw8ahkrj8RUJCozz3kedAz2B5ZIdLoQEH1z2tvaeJONI8R6RqeuyRQosx9Yn3s9yQyo6lQ==",
+      "version": "6.25.3",
+      "resolved": "https://registry.npmjs.org/sequelize/-/sequelize-6.25.3.tgz",
+      "integrity": "sha512-sbbvDGft6UfSRdIC0dcZvMxxJYi6g0+IgWvIpTuk6ccEoIyLcr7Sk6nXWwGfkdlDabGeunhhhI4yH8PleVMvtw==",
       "requires": {
         "@types/debug": "^4.1.7",
         "@types/validator": "^13.7.1",
@@ -4104,6 +4088,14 @@
             "ms": "2.1.2"
           }
         },
+        "lru-cache": {
+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
+          "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
+          "requires": {
+            "yallist": "^4.0.0"
+          }
+        },
         "ms": {
           "version": "2.1.2",
           "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
@@ -4116,6 +4108,11 @@
           "requires": {
             "lru-cache": "^6.0.0"
           }
+        },
+        "yallist": {
+          "version": "4.0.0",
+          "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
+          "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
         }
       }
     },
@@ -4487,9 +4484,10 @@
       "dev": true
     },
     "yallist": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-2.1.2.tgz",
+      "integrity": "sha512-ncTzHV7NvsQZkYe1DW7cbDLm0YpzHmZF5r/iyP3ZnQtMiJ+pjzisCiMNI+Sj+xQF5pXhSHxSB3uDbsBTzY/c2A==",
+      "dev": true
     },
     "yargs": {
       "version": "16.2.0",
diff --git a/package.json b/package.json
index 979cba2..8f3a6c8 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,9 @@
   "main": "index.js",
   "scripts": {
     "dev": "cross-env NODE_ENV=development nodemon --exitcrash index.js",
-    "prod": "cross-env NODE_ENV=production node index.js"
+    "staging_prep": "npm i && cross-env NODE_ENV=staging npx sequelize-cli db:migrate",
+    "staging": "cross-env NODE_ENV=staging node index.js",
+    "prod": "NODE_ENV=production node index.js"
   },
   "repository": {
     "type": "git",
diff --git a/utils/jsonTransformer.js b/utils/jsonTransformer.js
new file mode 100644
index 0000000..2ddc5ef
--- /dev/null
+++ b/utils/jsonTransformer.js
@@ -0,0 +1,16 @@
+function getNestedValuesString(obj) {
+	let values = [];
+	for (key in obj) {
+		if (typeof obj[key] !== "object") {
+			values.push(obj[key]);
+		} else {
+			values = values.concat(getNestedValuesString(obj[key]));
+		}
+	}
+
+	return values.join();
+}
+
+module.exports = {
+	getNestedValuesString
+}
diff --git a/utils/logger.js b/utils/logger.js
index 0848582..62cb211 100644
--- a/utils/logger.js
+++ b/utils/logger.js
@@ -48,9 +48,8 @@ const logger = (callingModule) => {
       logFormat,
     ),
     transports: [
-      process.env.NODE_ENV !== "production" ?
-        new transports.Console() :
-        new transports.File({ filename: __dirname + "/../logs/common.log" }),
+      new transports.Console(),
+      new transports.File({ filename: __dirname + "/../logs/common.log" }),
       new transports.File({ filename: __dirname + "/../logs/error.log", level: "error" }),
     ]
   });
diff --git a/validators/index.js b/validators/index.js
index 4f6877e..9f5371e 100644
--- a/validators/index.js
+++ b/validators/index.js
@@ -1,9 +1,11 @@
 const { validationResult } = require("express-validator");
 
 const typedefs = require("../typedefs");
+const { getNestedValuesString } = require("../utils/jsonTransformer");
 
 /**
- * Middleware to call after running validators to finalize result
+ * Refer: https://stackoverflow.com/questions/58848625/access-messages-in-express-validator
+ * 
  * @param {typedefs.Req} req 
  * @param {typedefs.Res} res 
  * @param {typedefs.Next} next 
@@ -18,8 +20,9 @@ const validate = (req, res, next) => {
 		[err.param]: err.msg
 	}));
 
-	return res.status(400).json({
-		message: extractedErrors,
+	return res.status(400).send({
+		message: getNestedValuesString(extractedErrors),
+		errors: extractedErrors
 	})
 }