Dockerfile in capybara-screenshot-diff-1.6.3 vs Dockerfile in capybara-screenshot-diff-1.7.0

@@ -1,14 +1,12 @@
 # Usage:
 #
 #   $ docker build . -t csd
 #   $ docker run -v $(pwd):/app -ti csd rake test
 
-ARG RUBY_VERSION=2.7.2
+FROM jetthoughts/cimg-ruby:3.1-chrome
 
-FROM circleci/ruby:2.7.2-node-browsers
-
 RUN \
   # Install dependencies
   sudo apt-get update && \
   DEBIAN_FRONTEND=noninteractive sudo apt-get install -y \
     automake \
@@ -45,9 +43,10 @@
 RUN sudo /app/bin/install-vips
 
 ADD ./lib/capybara/screenshot/diff/version.rb /app/lib/capybara/screenshot/diff/
 ADD ./capybara-screenshot-diff.gemspec /app/
 ADD ./gems.rb /app/
+ADD ./Rakefile /app/
 
 RUN bundle install
 
 RUN \
   # Clean up