add backend, expressjs server running with mongodb uri connect

Author: oahmedqureshi

backend/index.js

@@ -0,0 +1,67 @@
+const express = require('express') 
+const mongoose = require('mongoose')
+
+const cors = require('cors')
+require('dotenv').config({ path: './.env.local' })
+
+const app = express()
+app.use(cors())
+app.use(express.json())
+
+// services
+
+// routes
+const publicRoutes = require('./routes/publicRoutes')
+
+// models
+const userModel = require('./models/users')
+
+// DB connection
+mongoose.connect(process.env.MONGODB_URI, {useNewUrlParser: true, useUnifiedTopology: true}, function(error) {
+    // Check error in initial connection. There is no 2nd param to the callback.
+    if(error) {
+        console.log('error: ', error);
+    }
+    // ready states being:
+    // 0: disconnected
+    // 1: connected
+    // 2: connecting
+    // 3: disconnecting
+    console.log("mongoose.connection.readyState: ",mongoose.connection.readyState);
+})
+
+// schema models
+userModel()
+
+// auth0 middleware end
+
+// protected routes 
+// authRoutes(app)
+
+// public routes
+publicRoutes(app)
+
+
+// async await can execute without esm  
+
+// async function delayedLogger(...messages) {
+//     return new Promise((resolve) => {
+//         setImmediate(() => {
+//             console.debug(...messages);
+//             resolve(true);
+//         });
+//     });
+// }
+
+// async function doLogs() {
+//     delayedLogger('2. Then I run next!');
+//     console.log('1. I run first!');
+//     await delayedLogger('3. Now I run third because I "await"');
+//     console.log('4. And I run last!');
+// }
+// doLogs()
+
+const port = process.env.PORT || 3200
+app.listen(port, ()=>{
+    console.log("server is listing on port: ", port)
+})

backend/models/users.js

@@ -0,0 +1,17 @@
+const mongoose = require('mongoose')
+
+const { Schema } = mongoose
+
+const userModel = () => {
+    
+    const userSchema = new Schema({
+        firstName: String,
+        lastName: String,
+        fullName: String,
+        picture: String,
+        email: String
+    })
+    mongoose.model('users', userSchema)
+}
+
+module.exports = userModel