DockerCompose.md in flipper-0.11.0.beta1

- old
+ new

@@ -5,12 +5,15 @@
 new contributor could start working on code with a minumum efforts.
 
 ## Steps:
 
 1. Install Docker Compose https://docs.docker.com/compose/install
-2. Install gems `docker-compose run --rm app bundle install`
-3. Run specs `docker-compose run --rm app bundle exec rspec`
-4. Optional: log in to container an using a bash for running specs
+1. Build the app container `docker-compose build`
+1. Install gems `docker-compose run --rm app bundle install`
+1. Run specs `docker-compose run --rm app bundle exec rspec`
+1. Run tests `docker-compose run --rm app bundle exec rake test`
+1. Clear and check files with Rubocop `docker-compose run --rm  app bundle exec rubocop -D`
+1. Optional: log in to container an using a bash for running specs
 ```sh
 docker-compose run --rm app bash
 bundle exec rspec
 ```