Decoupled app from index.js

boilerplates/javascript/app.js

@@ -0,0 +1,32 @@
+const express = require('express');
+const cors = require('cors');
+
+const app = express();
+
+app.use(cors());
+app.use(express.json());
+app.use(
+  express.urlencoded({
+    extended: true,
+  })
+);
+
+app.use('/health', (req, res) => {
+  const healthCheck = {
+    uptime: process.uptime(),
+    message: 'OK',
+    timestamp: Date.now(),
+  };
+  try {
+    res.send(healthCheck);
+  } catch (error) {
+    healthCheck.message = error;
+    res.status(503), send();
+  }
+});
+
+const PORT = '5000' || process.env.PORT;
+module.exports = {
+  app,
+  PORT,
+};

boilerplates/javascript/config/config.js

@@ -1,7 +1,5 @@
 require('dotenv').config();
 
-DB_URI = process.env.DB_URI;
-
 const DB_URI = process.env.DB_URI;
 
 module.exports = {

boilerplates/javascript/config/db.js

@@ -0,0 +1,15 @@
+const mongoose = require('mongoose');
+const { DB_URI } = require('./config');
+
+const dbConnection = async () => {
+  await mongoose
+    .connect(DB_URI, { useNewUrlParser: true, useUnifiedTopology: true })
+    .then(() => {
+      console.log('Database connected successfully!');
+    })
+    .catch((error) => {
+      console.log(error);
+    });
+};
+
+module.exports = dbConnection;

boilerplates/javascript/index.js

@@ -1,42 +1,11 @@
-const express = require('express');
-const cors = require('cors');
-const mongoose = require('mongoose');
+const { app, PORT } = require('./app');
+const dbConnection = require('./config/db');
 
-const app = express();
-const PORT = '5000' || process.env.PORT;
-const { DB_URI } = require('./config/config');
-
-mongoose
-  .connect(DB_URI, { useNewUrlParser: true, useUnifiedTopology: true })
-  .then(() => {
-    console.log('Database connected successfully!');
-  })
-  .catch((error) => {
-    console.log(error);
+const bootstrap = () => {
+  app.listen(PORT, () => {
+    dbConnection();
+    console.log(`app is listening on http://localhost:${PORT}..`);
   });
+};
 
-app.use(cors());
-app.use(express.json());
-app.use(
-  express.urlencoded({
-    extended: true,
-  })
-);
-
-app.use('/health', (req, res) => {
-  const healthCheck = {
-    uptime: process.uptime(),
-    message: 'OK',
-    timestamp: Date.now(),
-  };
-  try {
-    res.send(healthCheck);
-  } catch (error) {
-    healthCheck.message = error;
-    res.status(503), send();
-  }
-});
-
-app.listen(PORT, () => {
-  console.log(`app is listening on http://localhost:${PORT}..`);
-});
+bootstrap();