phpmyadmin: The phpMyAdmin configuration storage is not completely configured

[apolopena]

Describe the bug

When you log into phpmyadmin you see the following warning at the bottom of the page
The phpMyAdmin configuration storage is not completely configured

Screenshots

Steps to reproduce

1. Fork or copy this repo
2. make sure phpmyadmin is set to install in starter.ini
3. Force the workspace image to build by incrementing the for INVALIDATE_CACHE in .gitpod.Dockerfile
4. Pushes changes to the repo
5. Create a new workspace in Gitpod
6. Log into phpmyadmin

Expected behavior

There should be no warnings and all phpmyadmin features should be setup programatically upon initialization of the workspace

Additional information

Helpful steps can be found here.

[apolopena]

fixed but without a way to set passwords and usernames from an .env file for a controluser we now get an warning message in the phpmyadmin dashboard (on the bottom of the screen).

Your server is running with default values for the controluser and password (controlpass) and is open to intrusion; you really should fix this security weakness by changing the password for controluser 'pma'.

[apolopena]

depends on #64