Dockerize! Startup with docker-compose up

Make sure to docker-compose build first

Dockerfile

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+FROM ruby:2.1
+
+# throw errors if Gemfile has been modified since Gemfile.lock
+RUN bundle config --global frozen 1
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+RUN apt-get update && apt-get install -y nodejs --no-install-recommends && \
+    apt-get install -y mysql-client postgresql-client sqlite3 --no-install-recommends && \
+    apt-get install -y zip unzip --no-install-recommends && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY Gemfile /usr/src/app/
+COPY Gemfile.lock /usr/src/app/
+
+RUN bundle install
+
+COPY install_extjs.rb /usr/src/app/
+RUN /usr/src/app/install_extjs.rb
+
+EXPOSE 3000
+CMD ["rails", "server", "-b", "0.0.0.0"]