Local development with docker

README.md

@@ -124,11 +124,25 @@ PRs to add more _browserslist supported_ browsers are welcome 👋
   transpiling / autoprefixing for browsers, this behaviour is what's intended in most cases, but might surprise you otherwise.
 * Right now, Chrome for Android and Firefox for Android are resolved to their desktop equivalents. The `caniuse` database does not currently store historical data for these browsers separately (except the last version) See [#156](https://github.com/ai/browserslist/issues/156)
 
-## Development
+## Development (with Docker))))
 
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+After checking out the repo, run:
 
-To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+```bash
+docker-compose run app bundle install
+```
+
+Run tests with:
+
+```bash
+docker-compose run app bundle exec rspec
+```
+
+Run RuboCop with:
+
+```bash
+docker-compose run app bundle exec rubocop
+```
 
 ## Contributing
 

docker-compose.yml

@@ -0,0 +1,18 @@
+version: '3.4'
+
+services:
+  app:
+    image: ruby:2.5.1
+    environment:
+      - BUNDLE_PATH=/bundle
+      - BUNDLE_CONFIG=/app/.bundle/config
+    command: bash
+    working_dir: /app
+    volumes:
+      - .:/app:cached
+      - bundler_data:/bundle
+    tmpfs:
+      - /tmp
+
+volumes:
+  bundler_data: