Fix/2078 docker: Some bugs in docker deploy

[fv3rdugo]

These changes fix issues with Docker deployment.

We recommend deploying Docker only for testing or development environments.

Description

• changed docker mysql to mariadb
• added ovmf package installation to docker backend
• updated removal script to clean up

Motivation and Context

Solve this problem with database:

root@8fbc7e8dd185:/ravada# PERL5LIB=./lib ./script/rvd_back --add-user admin
INFO: creating table groups_local
DBD::mysql::db do failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(0),  name char(255) NOT NULL )' at line 1 at lib/Ravada.pm line 2488

And this ovmf error:

libvirt error code: 9, message: operation failed: unable to find any master var
 store for loader: /usr/share/OVMF/OVMF_CODE_4M.fd
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[frankiejol]

I see the Github automatic check fails, I try to check where could this come from.