Sometimes you just want to run the thing.
This repo contains Docker one-liners to quickly create or run Ruby and Ruby framework-based projects — no local setup needed.
Ideal for quick testing, prototyping, teaching, or Friday experiments. 😎
Just open your terminal and go.
- Docker
- A terminal
- A sense of adventure (and maybe some caution)
- ✅ Pure Ruby
- ✅ Sinatra
- ✅ Rails
- ✅ Grape
- ✅ Rodakase
- ✅ Cuba
Each folder contains a minimal example that can be run using the one-liner shown below.
File: ruby/sort.rb
docker run --rm -it \
-v "$(pwd):/usr/src/app" \
-w /usr/src/app \
ruby:3.2 \
sh -c "gem install test pry && ruby ruby/sort.rb".
├── cuba
│ └── app.rb
├── grape
│ ├── app.rb
│ └── config.ru
├── LICENSE
├── rails-app
│ ├── app
│ ├── bin
│ ├── config
│ ├── config.ru
│ ├── db
│ ├── Dockerfile
│ ├── Gemfile
│ ├── Gemfile.lock
│ ├── lib
│ ├── log
│ ├── public
│ ├── Rakefile
│ ├── README.md
│ ├── script
│ ├── storage
│ ├── test
│ ├── tmp
│ └── vendor
├── README.md
├── rodakase
│ ├── app.rb
│ ├── Gemfile
│ ├── Gemfile.lock
│ └── vendor
├── ruby
│ └── sort.rb
└── sinatra
└── app.rb
20 directories, 16 filesFile: sinatra/app.rb
docker run --rm -p 4567:4567 \
-v "$(pwd):/usr/src/app" \
-w /usr/src/app \
ruby:3.2 \
sh -c "gem install sinatra rack puma rackup && ruby sinatra/app.rb"Visit: http://localhost:4567
docker run --rm -p 3000:3000 \
-v "$(pwd):/usr/src/app" \
-w /usr/src/app \
ruby:3.2 \
sh -c "apt-get update && apt-get install -y nodejs yarn && gem install rails bundler && rails new rails-app"docker run --rm -p 3000:3000 \
-v "$(pwd)/rails-app:/usr/src/app" \
-w /usr/src/app \
ruby:3.2 \
sh -c "apt-get update && apt-get install -y nodejs yarn && gem install bundler && bundle install && rails s -b 0.0.0.0"
Visit: http://localhost:3000
docker run --rm -p 9292:9292 \
-v "$(pwd)/grape:/usr/src/app" \
-w /usr/src/app \
ruby:3.2 \
sh -c "gem install grape rack rackup puma && rackup -o 0.0.0.0"Visit: http://localhost:9292
Because sometimes:
You want to test a gem or script fast
You don't want to pollute your local Ruby environment
You’re teaching or demoing something quickly
You like your dev life simple
One-liners are great, but remember:
With great speed comes great responsibility. 🚨
Use them wisely, especially in production-like setups.
Want to build things the clean way? Architecture, testing, scalable apps?