dockerfile in bulldozer-1.6.0 vs dockerfile in bulldozer-1.6.1

@@ -1,11 +1,23 @@
 FROM ruby:2.5.3
 # Install VIM to edit credentials.yml.enc file
 RUN apt-get update && apt-get install -y vim
 ENV EDITOR="vim"
 # Install container dependencies
-RUN apt-get update && apt-get install -y libc-ares2 libv8-3.14.5 --no-install-recommends && rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y libc-ares2 libv8-3.14.5 postgresql-client nodejs --no-install-recommends && rm -rf /var/lib/apt/lists/*
+# Install Chrome to use with Capybara JavaScript specs
+RUN wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - \
+  && echo "deb http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list
+RUN apt-get update && apt-get -y install google-chrome-stable
 # Set the work directory inside container
 RUN mkdir /app
 WORKDIR /app
+# Copy the Gemfile inside the container
+COPY bulldozer.gemspec /app/
+COPY Gemfile* /app/
 # Copy all the rest inside work directory
-COPY . /app
+COPY . /app
+# Go inside the /app folder, without this you have problems with relative paths
+RUN cd /app
+# Install dependencies
+RUN gem install bundler
+RUN bundle install --jobs 32 --retry 4
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