Add GitHub Action for running CI tests

This adds a new GitHub action for running all the tests

Author: kenyonj

.github/test_runner/Dockerfile

@@ -8,7 +8,6 @@ LABEL "com.github.actions.color"="purple"
 ENV LC_ALL C.UTF-8
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8
-ENV BUNDLER_VERSION 1.17.3
 
 COPY entrypoint.sh /