Build docker image for Rails application.
To build image run this command (change the tag name & version with your preferred tag name & version).
$ docker build . -t myorganization/myimage:1.0.0
To create a container from the image, run this command (change the tag name & version with your preferred tag name & version).
$ docker run -d -p 3000:3000 --name rails-app myorganization/myimage:1.0.0
Then you can access the app from the browser with this url: http://127.0.0.1:3000
This repository is proven by running build in Dockerhub, you can see the result here.