Using the GitHub App template as a base I created this simple app that installed on a repo allows you to put a mandatory step and wait for the builds triggered to pass to be able to merge.

Install

bundle install

Set environment variables

1. Create a copy of the .env-example file called .env.
2. Add your GitHub App's private key, app ID, and webhook secret to the .env file.

Run the server

1. Run ruby server.rb or rerun 'server.rb' on the command line.

PD: it's my first ruby code so feedback is more than welcome =D!