nextcloud-docs/rails

What is Ruby on Rails

Ruby on Rails, often simply referred to as Rails, is an open source web application framework which runs via the Ruby programming language. It is a full-stack framework: it allows creating pages and applications that gather information from the web server, talk to or query the database, and render templates out of the box. As a result, Rails features a routing system that is independent of the web server.

wikipedia.org/wiki/Ruby_on_Rails

How to use this image

1. create a Dockerfile in your rails app project

FROM rails:onbuild

Put this file in the root of your app, next to the Gemfile.

This image includes multiple ONBUILD triggers so that should be all that you need for most applications. The build will ADD . /usr/src/app, RUN bundle install, EXPOSE 3000, and set the default command to rails server.

2. build the rails app image

docker build -t my-rails-app .

3. start the rails app container

docker run --name some-rails-app -d my-rails-app

Then hit http://container-ip:3000 in a browser. On the other hand, if you need access outside the host on port 8080:

docker run --name some-rails-app -p 8080:3000 -d my-rails-app

Then hit http://localhost:8080 or http://host-ip:8080 in a browser.