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This also includes Fred's updates to the `README-short.txt` files, and a bunch of very minor changes for consistency (using "PHP" instead of "php", ending sentences that describe and lead into a code block with a ":", using "Go" instead of "Golang" and "Hy" instead of "Hylang" within prose, not using periods at the end of headlines, etc). A really fun one included here is that Java mentioned both using GNU Make inside the container (and `java` doesn't include `make` presently), and some of the prose mentioned `go build` after we ran `javac`, which was extra neat.
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What is Ruby?
Ruby is a dynamic, reflective, object-oriented, general-purpose, open-source programming language. According to its authors, Ruby was influenced by Perl, Smalltalk, Eiffel, Ada, and Lisp. It supports multiple programming paradigms, including functional, object-oriented, and imperative. It also has a dynamic type system and automatic memory management.
How to use this image
Create a Dockerfile in your Ruby app project
FROM ruby:2.1.2-onbuild
CMD ["./your-daemon-or-script.rb"]
Put this file in the root of your app, next to the Gemfile.
This image includes multiple ONBUILD triggers which should be all you need to
bootstrap most applications. The build will COPY . /usr/src/app and RUN bundle install.
You can then build and run the Ruby image:
docker build -t my-ruby-app .
docker run -it --name my-running-script my-ruby-app
Run a single Ruby script
For many simple, single file projects, you may find it inconvenient to write a
complete Dockerfile. In such cases, you can run a Ruby script by using the
Ruby Docker image directly:
docker run -it --rm --name my-running-script -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp ruby:2.1.2 ruby your-daemon-or-script.rb