How to start service in nodejs

How to start a service in Node.js? Create a Node.js project and install dependencies. Write server code and listen on the port. Start the server using the node command. Access the local address to test the service. Use PM2 management services.

How to start a service in Node.js

Starting a service in Node.js involves the following steps:

1. Create a Node.js application

Create a new Node.js project and install the necessary dependencies:

<code>mkdir my-app
cd my-app
npm init -y</code>

2. Write server code

Create a server.js file containing the following code:

<code class="js">const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.send('Hello World!');
});

app.listen(3000, () => {
  console.log('Server is listening on port 3000');
});</code>

3. Start the service

Use the node command to start the server:

<code>node server.js</code>

This will start an Express server listening on port 3000.

4. Test the service

Visit http://localhost:3000 in your browser to confirm that the service is running.

5. Use PM2 to manage services

For production environments, use process managers such as PM2 to manage and monitor your services:

<code>npm install pm2 -g
pm2 start server.js</code>

PM2 Will run your service in the background and provide restart, logging and load balancing functions.

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