cheatsheets/dockerfile.md

title	category
Dockerfile	Devops

Inheritance

FROM ruby:2.2.2

Variables

ENV APP_HOME /myapp
RUN mkdir $APP_HOME

Initialization

RUN bundle install

WORKDIR /myapp

Onbuild

ONBUILD RUN bundle install   # when used with another file

Commands

EXPOSE 5900
CMD    ["bundle", "exec", "rails", "server"]

Reference

• https://docs.docker.com/engine/reference/builder/