Just pull this image, link with Postgres container, create db and migrate in running container and that's it.

Or let Docker Compose to make this job done (https://github.com/apiqcms/kms_docker/blob/master/docker-compose.yml):

version: '3' services: db: image: postgres web: image: webgradus/kms command: bundle exec rails s -p 3000 -b '0.0.0.0' environment: SECRET_TOKEN: abc RAILS_SERVE_STATIC_FILES: 'true' volumes: - .:/kms ports: - "3000:3000" depends_on: - db 

Environment variables you should care about are:

• SECRET_TOKEN - for secrets.yml
• RAILS_SERVE_STATIC_FILES - for serving static files by Rails
• DATABASE - database name prefix. Entire name is ENV['DATABASE'] + '_production'
• POSTGRES_PASSWORD - which is used for "Postgres" image