[tor-bugs] #22891 [Core Tor/Tor]: Add GitLab CI configs

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#22891: Add GitLab CI configs
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 Reporter:  catalyst                             |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ci, continuous-integration,          |  Actual Points:
  testing, best-practice, unit-testing, new-     |
  developers, review-group-22                    |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by nickm):

 Hm. I don't know all the docker+ssh stuff, so I'll assume it's right. The
 rest seems plausible.

 What does this imply for people's branches when uploaded to gitlab?
 Everything builds inside a container?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22891#comment:6>
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