Use a custom port

In most cases you don't need to change the default port that deplo.io chooses for your app. The chosen port will be injected as the env variable $PORT to the application at runtime. So in any case, for compiled languages you have to make sure the app is listening on the port defined in that env variable. For other languages such as Ruby, PHP, NodeJS or Python this will be automatically taken care of.

Setting a custom port on app creation

If you need to customize the port, you can configure it using the --port flag of nctl:

--port=8080    Port the app is listening on.

$ nctl create app go-example --port=5678

Updating the port of an application

For already existing applications you can use nctl update app with the --port flag to update the port.

$ nctl update app go-example --port=5678