Configuration as code for the GitHub Platform

Blogpost with explanation can be found on https://devopsjournal.io.
Overview repository for this setup. Since most of these items need to be running in a separate org, I created them on robs-tests.

1) Automate user onboarding and repository creation

For our training org we wanted to make the following steps easier:

1. Add new users and teams to the users.yml file
2. Create a PR
3. The workflow pull_request.yml workflow checks if:
   • The user file is valid yaml
   • The users is a valid GitHub handle
   • The user is already a member of the organization
4. After merging, the user-management.yml workflow runs and:
   • Create the team if needed
   • Add the user to the org
   • Create repository attendee-<userhandle>
   • Add the user to the repo
   • Add the user to the team
   • Add the team to the repo

Link to repo: robs-tests/user-test-repo