Finishing up the Docker-Compose file | NetGru

Finish the docker-compose file, create shell script to setup the environment (start the Docker containers, configure the external URL for GitLab, register the GitLab runner with GitLab CE), create shell script to verify that the runner has successfully registered with GitLab, create github.com repo where all the code for the project will be hosted (https://github.com/aidevnet/cicd-twitch)