updated some small details

server/index.js

@@ -0,0 +1,43 @@
+import mongoose from 'mongoose'; // MongoDB (database)
+import express from 'express'; // Backend App (server)
+import dotenv from 'dotenv'; // Secures variables
+import cors from 'cors'; // HTTP headers (enable requests)
+import morgan from 'morgan'; // Logs incoming requests
+// import routes from './api/routes/routes.js';
+// ^ ^ ^ un-comment this to use imported route(s)
+// doing this will link the following files:   index.js -> routes.js -> controllers.js -> User.js
+
+// initialize app
+const app = express();
+const origin = '*';
+
+// middlewares
+dotenv.config();
+app.use(cors({ origin }));
+app.use(express.json({ limit: '1mb', extended: false })); // body parser
+app.use(express.urlencoded({ limit: '1mb', extended: false })); // url parser
+app.use(morgan('common'));
+
+// configure db:
+// for "atlas" edit CONNECTION_URL in -> .env file || for "community server" edit <dbname>
+const CONNECTION_URL = process.env.CONNECTION_URL || 'mongodb://localhost:27017/<dbname>';
+const DEPRECATED_FIX = { useNewUrlParser: true, useUnifiedTopology: true, useCreateIndex: true };
+
+// connect to db
+mongoose
+  .connect(CONNECTION_URL, DEPRECATED_FIX)
+  .catch((error) => console.log('❌ MongoDB connection error', error)); // listen for errors on initial connection
+
+const db = mongoose.connection;
+db.on('connected', () => console.log('✅ MongoDB connected')); // connected
+db.on('disconnected', () => console.log('❌ MongoDB disconnected')); // disconnected
+db.on('error', (error) => console.log('❌ MongoDB connection error', error)); // listen for errors during the session
+
+// routes
+app.get('/', (request, response, next) => response.status(200).json('Hello World - Express.js'));
+// app.use('/api/v1/users', routes);
+// ^ ^ ^ un-comment this to use imported route(s)
+
+// server is listening for requests
+const PORT = process.env.PORT || 8080;
+app.listen(PORT, () => console.log(`✅ Server is listening on port: ${PORT}`));