# Node with Docker

## Hey Friends 👋


Let's try putting a NodeJs🟢 application (express server or any other node application) in a container

We will be using docker specifically 🐳

<hr />

### First lets create an express application
Run `npm init -y` to create an empty `package.json`

This generates our `package.json` with the following contents
```json
  
{
  "name": "express-basic-application",
  "version": "1.0.0",
  "description": "Basic Node App with Express",
  "main": "app.js",
  "scripts": {
    "start": "node app.js"
  },
  "author": "Naseel Niyas",
  "license": "ISC"
}
```
Now run `npm i express` or `yarn add express` to install express. It will add express as a dependency on your `package.json` file

Now, lets create an `app.js` file and open it up in a code editor

Enter the following code in `app.js`
```js
// Basic Express setup
const express = require('express');

const app = express();

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


app.listen(3000)
```

<hr />

### Creating our `Dockerfile`

The next important part of containerizing our app is to create a `Dockerfile`

Type in the following code on a file named `Dockerfile` (no extensions!)

```Dockerfile
FROM node:14

WORKDIR /app

COPY package.json /app

RUN npm install

COPY . /app

CMD ["npm", "start"]
```
<hr />

### Time to run our container! 📦

Making sure that you have `docker` installed, run: 

`
docker build -t image-name .
` ~ This creates the image on our local system

Then run the command 
`docker run -it -p 5000:3000
` to start our server!

You can now navigate to [http://localhost:5000/](http://localhost:5000/)

And there we go!

![image.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1626947187413/Bm4pGNwZG.png)
We got what we wanted! 🎊🎊

## If you want a more in depth tutorial do check out my video on the same 😊

%[https://www.youtube.com/watch?v=pqsC1AcuQkU]




**Got Stuck?** Grab the source code! <br />


%[https://github.com/techharvesting/node-docker]

### Byeee friends *keep coding!* 👋👨‍💻

%%[twitter]