Upgrade instructions from Postgresql 12 to 14

[froque]

Postgres 15 has a permissions problem.
See sameersbn/docker-postgresql#168

[kkimurak]

Test seems fail because of refused connection but there seems to be no problem with the gitlab container. In the test, docker ps is executed after docker compose up, but at this point the state of the sameersbn/postgresql container is "Restarting (1) Less than a second ago", and it may be stuck in a restart loop.

Local test on my environment (to follow circle ci step) worked - web interface open, login and creating new blank project succeed.

Could you please try restarting CI (by rebase and force-push, or something else)?

[froque]

@kkimurak postgres 14 was failling in circle ci with

�[33mpostgresql_1  |�[0m popen failure: Cannot allocate memory
�[33mpostgresql_1  |�[0m initdb: error: The program "postgres" is needed by initdb but was not found in the
�[33mpostgresql_1  |�[0m same directory as "/usr/lib/postgresql/14/bin/initdb".

upgrading to latest ubuntu resolves the problem
https://stackoverflow.com/a/77078191/3929185

[kkimurak]

@froque Ok build and test passed. Thank you for your work.
Please so be kind to wait for maintainer review,

---

note:
link to docker log when the postgres14 container was failing : https://app.circleci.com/pipelines/github/sameersbn/docker-gitlab/1316/workflows/db562f70-d7e2-498f-986b-3da600bcfb51/jobs/6155?invite=true#step-108-1433_39

[sachilles]

Hi,

regarding this PR I'd like to clarify some things.

Postgres 15 has a permissions problem. See sameersbn/docker-postgresql#168

Since I'm running GitLab from this repo with PostgreSQL 15.4, I can't confirm that PostgreSQL has some issues. However, it's a long time ago that I had to restore from backup.

[sachilles]

LGTM