Running a Rails Server with Our Image

Run Rails Server

Now that we have created our own tailor-made image, we should be able to start up a Rails server to run our app. Let’s try doing that now. We can start our Rails app inside a container based on our custom image with the following command:

$ docker run -p 3000:3000 railsapp bin/rails s -b 0.0.0.0 

This docker run command says, “Start a container based on our custom image railsapp, and run bin/rails s -b 0.0.0.0 inside it.” The -b option is needed in binding the Rails server to IP addresses.

Let’s run it now by clicking the Run button. You should see the familiar Rails ...