# Configuring custom start commands with a Procfileon Elastic Beanstalk
<a name="nodejs-configuration-procfile"></a>

You can include a file that's called `Procfile` at the root of your source bundle to specify the command that starts your application.

**Example Procfile**  

```
web: node index.js
```

For information about `Procfile` usage see [Buildfile and Procfile](platforms-linux-extend.build-proc.md).

**Note**  
This feature replaces the legacy `NodeCommand` option in the `aws:elasticbeanstalk:container:nodejs` namespace.