Allow more global configuration via environment variables

bdwyertechrequested to merge
bdwyertech/gitlab-runner:patch-3 into master

What does this MR do?

Allows more configuration via environment variables

Why was this MR needed?

To facilitate ease of configuration in a containerized environment

Are there points in the code the reviewer needs to double check?

Does this MR meet the acceptance criteria?

  • Documentation created/updated
  • Added tests for this feature/bug
  • In case of conflicts with master - branch was rebased

What are the relevant issue numbers?

#3799 (closed)

Edited by bdwyertech

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