* Use official SQL Server docker image for tests
* Try with tag 2019-latest instead of latest
* Use platform ubuntu-20.04 for SQL Server
* Switch to 2019-CU18-ubuntu-20.04
* Check with 2022-latest image tag and ubuntu-latest platform
* Update health-cmd
* Try sqlcmd without -N -C
* Re-include -N -C, try with ubuntu-20.04
* Try ubuntu-20.04 without -N -C (last trial)
* Finalize working config
* Remove unused env variables