phpMyAdmin installation and configuration

[flip111]

Would be nice to have the full installation of phpMyAdmin with all it's features. Here is the setup procedure https://docs.phpmyadmin.net/en/latest/setup.html#phpmyadmin-configuration-storage

Additionally an expiration time longer than 1440 seconds on the panel would be good (no expiration) ?

And exposing of the phpMyAdmin config file.

[nezhar]

I think the documentation mentioned in #55 does the job pretty well.

[flip111]

The environment variables don't allow for full config over phpMyAdmin. For example the expiration time can not be configured in this way. For this access to the php configuration file is required.

[flip111]

Maybe the php configuration file can be mapped in a similar way as commented in #51 (comment) ?