.gitlab-ci.yml doesn't run the CI properly when configured with postgres

Created by: sorasful

Hello there !

After I generated the .gitlab-ci.yml, I just pushed the newly created project to Gitlab and had few troubles.

The first one : Because of the tags, the gitlab's runners weren't able to pick up the jobs, and they were in a PENDING state undefinitely.

The second one : The values specified in the .gitlab-ci.yml file, in the "VARIABLES" section are not valid to run properly on Postgres.

Also, changing the variables in the "VARIABLES" section did not changed anything since the configuration is not loaded using environment variables.

I will create a PR for this !

Thanks for your time.