Docker rails migrations

I'm trying to get running my rails application with docker and fig, it counts with a redis server, mongodb, postgres, and nginx as well, Here is how my fig.yml looks like: ``` pg: image: docker-index.my.com/postgres ports: - 5432 redis: image: docker-index.my.com/redis ports: - 6379 mongodb: image: docker-index.my.com/mongodb ports: - 27017 app: build: . command: bundle exec rails s volumes: - .:/beesor ports: - 3000:3000 links: - pg - redis - mongodb environment: RAILS_ENV: production ``` Everything works ok till the moment of starting app, as rails initializers hooks on server starts then I got errors regarding the database connection, the database does not exists! of course because it was not created on the Dockerfile (see below) Dockerfile contents: ``` # DOCKER-VERSION 0.10.0 FROM docker-index.my.com/ruby:1.9.3 MAINTAINER my.com RUN apt-get update -qq && apt-get install -y git-core xvfb curl nodejs libqt4-dev libgtk2.0-0 libgtkmm-3.0-1 libnotify4 sqlite3 libsqlite3-dev graphicsmagick imagemagick subversion libpq-dev libxml2-dev libxslt-dev git build-essential RUN mkdir /my_app WORKDIR /my_app RUN gem install bundler ADD Gemfile /my_app/Gemfile ADD Gemfile.lock /my_app/Gemfile.lock RUN bundle install RUN bundle pack --all ADD . /my_app ``` I don't see a place where I can put the rake db:create db:migrate db:seed commands!, if I put them at the end of the Dockerfile then when fig tries to build app it complains about the database server does not exits, (in the time that fig builds app container the other containers are not started), and I could not fix this changing the order on the fig.yml, I'm facing egg-chicken problem here, who can I get this working? I'm sure that all the links work perfectly so the problem is more about orchestration of scripts.