feat: add .env function, this is necessary for security

.env.example

@@ -0,0 +1 @@
+MONGO_URL="your mongodb uri"

.gitignore

@@ -1,2 +1,3 @@
 node_modules
-package-lock.json
+package-lock.json
+.env

app/config/db.config.js

@@ -1,3 +1,3 @@
 module.exports = {
-  url: "mongodb://0.0.0.0:27017/bezkoder_db"
+  url: process.env.MONGO_URL
 };

package.json

@@ -17,6 +17,7 @@
   "license": "ISC",
   "dependencies": {
     "cors": "^2.8.5",
+    "dotenv": "^16.4.5",
     "express": "^4.18.2",
     "mongoose": "^6.11.1"
   }

server.js

@@ -1,3 +1,5 @@
+//import dotenv module, and call config function to be able to use .env
+require('dotenv').config()
 const express = require("express");
 const cors = require("cors");