dev.Dockerfile

# 1: Use ruby 2.3.3 as base:
FROM ruby:2.3.3

# 2: We'll set the application path as the working directory
WORKDIR /usr/src/app

# 3: We'll set the working dir as HOME and add the app's binaries path to $PATH:
ENV HOME=/usr/src/app PATH=/usr/src/app/bin:$PATH

# 4: Expose the app web port:
EXPOSE 3000

# 5: Set the default command:
CMD ["rails", "server", "-b", "0.0.0.0", "-p", "3000"]

# 6: Install node as a javascript runtime for asset compilation:
# gpg keys listed at https://github.com/nodejs/node
# Somehow the `xz-utils` package went missing... we'll need to add it during this command:
RUN set -ex \
  && apt-get update \
  && apt-get install -y --no-install-recommends xz-utils \
  && for key in \
    9554F04D7259F04124DE6B476D5A82AC7E37093B \
    94AE36675C464D64BAFA68DD7434390BDBE9B9C5 \
    0034A06D9D9B0064CE8ADF6BF1747F4AD2306D93 \
    FD3A5288F042B6850C66B31F09FE44734EB7990E \
    71DCFD284A79C3B38668286BC97EC7A07EDE3FC1 \
    DD8F2338BAE7501E3DD5AC78C273792F7D83545D \
    B9AE9905FFD7803F25714661B63B535A4C206CA9 \
    C4F0DFFF4E8C1A8236409D08E73BC641CC11F4C8 \
  ; do \
    gpg --keyserver ha.pool.sks-keyservers.net --recv-keys "$key"; \
  done \
  && export NPM_CONFIG_LOGLEVEL=info \
  && export NODE_VERSION=7.4.0 \
  && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/node-v$NODE_VERSION-linux-x64.tar.xz" \
  && curl -SLO "https://nodejs.org/dist/v$NODE_VERSION/SHASUMS256.txt.asc" \
  && gpg --batch --decrypt --output SHASUMS256.txt SHASUMS256.txt.asc \
  && grep " node-v$NODE_VERSION-linux-x64.tar.xz\$" SHASUMS256.txt | sha256sum -c - \
  && tar -xJf "node-v$NODE_VERSION-linux-x64.tar.xz" -C /usr/local --strip-components=1 \
  && rm "node-v$NODE_VERSION-linux-x64.tar.xz" SHASUMS256.txt.asc SHASUMS256.txt \
  && apt-get remove --purge -y xz-utils \
  && rm -rf /var/lib/apt/lists/*

# 7: Install postgres client tools - needed to dump the database schema in SQL format:
RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8 \
 && export PG_MAJOR=9.6 \
 && echo 'deb http://apt.postgresql.org/pub/repos/apt/ jessie-pgdg main' $PG_MAJOR > /etc/apt/sources.list.d/pgdg.list \
 && apt-get update \
 && apt-get install -y --no-install-recommends postgresql-client-$PG_MAJOR \
 && rm -rf /var/lib/apt/lists/*

# 8: Install the current project gems - they can be safely changed later during development via
# `bundle install` or `bundle update`:
ADD Gemfile* /usr/src/app/
RUN set -ex && bundle install