Simple node app boilerplate

app.js

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+const express = require('express');
+const cors = require('cors');
+const dotenv = require('dotenv');
+const helmet = require('helmet');
+const routes = require('./routes/index');
+const httpStatus = require('http-status');
+
+const app = express();
+
+// load env variables
+dotenv.config();
+
+// set security HTTP headers
+app.use(helmet());
+
+// parse json request body
+app.use(express.json());
+
+// parse urlencoded request body
+app.use(express.urlencoded({ extended: true }));
+
+// enable cors
+app.use(cors());
+app.options('*', cors());
+
+// v1 api routes
+app.use('/', routes);
+
+// send back a 404 error for any unknown api request
+app.get("*", (req, res) => {
+    res.send("404 - Not found");
+});
+
+app.listen(process.env.PORT, () => {
+    console.log("Server has started");
+})