Dockerfile.dev

# NOTE: 
#   1. Combine the apt-get update and apt-get install commands into a single RUN instruction
#      This ensures that whenever you change the packages being installed, you get the latest
#      package/repository information at the same time not cached information.

FROM ruby:3.0.0

LABEL maintainer="philip.maina@hey.com"

# Allow apt to work with https-based sources e.g node & yarn
RUN apt-get update -yqq && apt-get install -yqq --no-install-recommends \
  apt-transport-https

# Ensure more up to date version of node
RUN curl -sL https://deb.nodesource.com/setup_14.x | bash -

# Ensure latest packages for yarn
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list

# Install system packages
RUN apt-get update -yqq && apt-get install -yqq --no-install-recommends \ 
  nodejs \
  yarn

ENV APP_HOME /usr/src/app
RUN mkdir -p $APP_HOME
WORKDIR $APP_HOME

# Remove existing running server
COPY bin/docker-entrypoint.sh /usr/bin/
RUN chmod +x /usr/bin/docker-entrypoint.sh

# Gemfile Caching Trick: 
#   Separate the copying of files that should trigger a rebuild of our gems from those that shouldn’t.
#   This avoids rebuilding the image for these steps (and hence running bundle install) when other unrelated 
#   files are changed.
COPY Gemfile $APP_HOME/
COPY Gemfile.lock $APP_HOME/
RUN bundle install


# Yarn Caching Trick:
COPY package.json $APP_HOME/
COPY yarn.lock $APP_HOME/
RUN yarn install

# Copy the app repo
COPY . $APP_HOME

ENTRYPOINT ["/usr/bin/docker-entrypoint.sh"]

# Default command to run when a container is started from the image. 
CMD ["bin/rails", "s", "-b", "0.0.0.0"]