Config npm and default config file

package-lock.json

       "license": "ISC",
       "dependencies": {
         "bcryptjs": "^2.4.3",
+        "config": "^3.3.7",
         "cors": "^2.8.5",
         "express": "^4.18.1",
         "express-jwt": "^7.7.2",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
     },
+    "node_modules/config": {
+      "version": "3.3.7",
+      "resolved": "https://registry.npmjs.org/config/-/config-3.3.7.tgz",
+      "integrity": "sha512-mX/n7GKDYZMqvvkY6e6oBY49W8wxdmQt+ho/5lhwFDXqQW9gI+Ahp8EKp8VAbISPnmf2+Bv5uZK7lKXZ6pf1aA==",
+      "dependencies": {
+        "json5": "^2.1.1"
+      },
+      "engines": {
+        "node": ">= 10.0.0"
+      }
+    },
     "node_modules/configstore": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/configstore/-/configstore-5.0.1.tgz",
       "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
       "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus="
     },
+    "node_modules/json5": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.1.tgz",
+      "integrity": "sha512-1hqLFMSrGHRHxav9q9gNjJ5EXznIxGVO09xQRrwplcS8qs28pZ8s8hupZAmqDwZUmVZ2Qb2jnyPOWcDH8m8dlA==",
+      "bin": {
+        "json5": "lib/cli.js"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/jsonwebtoken": {
       "version": "8.5.1",
       "resolved": "https://registry.npmjs.org/jsonwebtoken/-/jsonwebtoken-8.5.1.tgz",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
       "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
     },
+    "config": {
+      "version": "3.3.7",
+      "resolved": "https://registry.npmjs.org/config/-/config-3.3.7.tgz",
+      "integrity": "sha512-mX/n7GKDYZMqvvkY6e6oBY49W8wxdmQt+ho/5lhwFDXqQW9gI+Ahp8EKp8VAbISPnmf2+Bv5uZK7lKXZ6pf1aA==",
+      "requires": {
+        "json5": "^2.1.1"
+      }
+    },
     "configstore": {
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/configstore/-/configstore-5.0.1.tgz",
       "resolved": "https://registry.npmjs.org/json-stringify-safe/-/json-stringify-safe-5.0.1.tgz",
       "integrity": "sha1-Epai1Y/UXxmg9s4B1lcB4sc1tus="
     },
+    "json5": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.1.tgz",
+      "integrity": "sha512-1hqLFMSrGHRHxav9q9gNjJ5EXznIxGVO09xQRrwplcS8qs28pZ8s8hupZAmqDwZUmVZ2Qb2jnyPOWcDH8m8dlA=="
+    },
     "jsonwebtoken": {
       "version": "8.5.1",
       "resolved": "https://registry.npmjs.org/jsonwebtoken/-/jsonwebtoken-8.5.1.tgz",

package.json

   "license": "ISC",
   "dependencies": {
     "bcryptjs": "^2.4.3",
+    "config": "^3.3.7",
     "cors": "^2.8.5",
     "express": "^4.18.1",
     "express-jwt": "^7.7.2",

src/config/default.json

+{
+    "Test": "Diligent"
+}

src/server.js

 const swaggerJsDoc = require("swagger-jsdoc")
 const swaggerUi = require("swagger-ui-express")
 const { errorLogger, errorResponder } = require('./middleware/errorHandling.js')
-const cors = require('cors')
-const helmet = require('helmet')
-
+const cors = require('cors') //Cross-origin resource sharing
+const helmet = require('helmet') //Basic protection against attacks like XSS
+const config = require('config') //Default configuration file
 
 const swaggerOptions = {
     swaggerDefinition: {