# Installation and Pushing Code

## I**nstallation**

- At root directory of nodejs app
    
    ```bash
    git init
    git add .
    git commit -m 'initialize'
    ```
    

• (Make sure to install heroku cli)

`• heroku create or heroku create appname`

- If there is already an existing app then we need to change the prev origin to current one by:
    
    `heroku git:remote -a appname`
    
- For changing app name, remote name has to be changed too.

```bash
git remote rename heroku newname
```

 

or

```bash
git remote heroku newname
heroku git:remote -a newname
```

- For changing app name(this has to be done before)

`heroku apps: rename newname`

or for outside git repository

`heroku apps: rename newname —app oldname`

## **Pushing Code**

`git push heroku main`

For non-main branch:

`git push heroku testbranch:main`

**In nodejs app:**

```jsx
app.listen(process.env.PORT || 3000,()=>{
	console.log('listening');
})
```