Dockerfile

FROM ruby:2.5.3

# Update node.js package distribution from 4.8.2 to 10.x
RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -

# Install apt based dependencies required to run Rails as
# well as RubyGems. As the Ruby image itself is based on a
# Debian image, we use apt-get to install those.
RUN apt-get update && apt-get install -y \
  libpq-dev \
  build-essential \
  nodejs

# We need wget to set up the PPA and unzip to install the Chromedriver
RUN apt-get install -y wget unzip

# Set up the Chrome PPA
RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add -
RUN echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list

# Update the package list and install chrome
RUN apt-get update -y
RUN apt-get install -y google-chrome-stable

# Set up Chromedriver Environment variables
ENV CHROMEDRIVER_VERSION 2.19
ENV CHROMEDRIVER_DIR /chromedriver
RUN mkdir $CHROMEDRIVER_DIR

# Download and install Chromedriver
RUN wget -q --continue -P $CHROMEDRIVER_DIR "http://chromedriver.storage.googleapis.com/$CHROMEDRIVER_VERSION/chromedriver_linux64.zip"
RUN unzip $CHROMEDRIVER_DIR/chromedriver* -d $CHROMEDRIVER_DIR

# Put Chromedriver into the PATH
ENV PATH $CHROMEDRIVER_DIR:$PATH

# Install yarn
ENV PATH=/root/.yarn/bin:$PATH
RUN curl -o- -L https://yarnpkg.com/install.sh | bash

# Configure the main working directory. This is the base
# directory used in any further RUN, COPY, and ENTRYPOINT
# commands.
WORKDIR /app

# Pre-install nokogiri so we don't have to recompile when adding gems
RUN gem install nokogiri --version 1.8.3

# Copy the Gemfile as well as the Gemfile.lock and install
# the RubyGems. This is a separate step so the dependencies
# will be cached unless changes to one of those two files
# are made.
COPY Gemfile Gemfile.lock ./
RUN bundle install