Converge cloudserver images

[francoisferrand]

Build federation image as additional layers on top of "standard" cloudserver image, to avoid duplication and ensure the image we tested is used in production.
There are still some differences at the moment (e.g. name of user, path) which should be further converged to minimize differences, may be done over time after considering all things.

This allows us to fully control (and minimize) what gets into the image, relying on any official node image. Also, now switch from python-based supervisord to a golang reimplementation [1], to minimize dependencies and CVEs.

Finally, took the change to fix startup command of the image, to ensure it properly propagates OS signals.

[1] ochinchina/supervisord

Issue: CLDSRV-597

[bert-e]

Hello francoisferrand,

My role is to assist you with the merge of this
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[bert-e]

Waiting for approval

The following approvals are needed before I can proceed with the merge:

• the author

• 2 peers

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.11%. Comparing base (d5022f0) to head (36c92c0).
Report is 2 commits behind head on development/9.0.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@               Coverage Diff                @@
##           development/9.0    #5716   +/-   ##
================================================
  Coverage            62.11%   62.11%           
================================================
  Files                  185      185           
  Lines                11624    11624           
================================================
  Hits                  7220     7220           
  Misses                4404     4404           

Flag	Coverage Δ
unit	62.11% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[rachedbenmustapha]

Would be good to post to the #eng-federation chan for review.

[francoisferrand]

/approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/9.0

The following branches have NOT changed:

• development/7.10
• development/7.4
• development/7.70
• development/8.8

Please check the status of the associated issue CLDSRV-597.

Goodbye francoisferrand.

The following options are set: approve