[Feature] Expand docker-compose.yml file to include database GUI application image (Adminer, phpMyAdmin)

[possumbilities]

Problem

See #199, this builds from there.

MVP
At a minimum:

 - setup MySQL server (MariaDB preferably)
 - setup a web server (Apache), running latest WordPress files
 - make Web and DB server connect with each other appropriately
 - mount the db locally, so it persists
 - mount the WordPress install locally, so it persists
 - mount the wp-plugin-creativecommons plugin directory into the web server at wp-content/plugins/, so it can be user activated
-  include appropriate .gitignore additions so local mount points are not tracked ( ./dev/db & ./dev/wordpress)
 update documentation to reflect new docker compose one-liner referencing docker-compose.yml file

The baseline Docker Image would benefit from having some kind of GUI application setup to help with Database manipulation, especially for devs not comfortable interacting with the MySQL server via the command line directly.

Description

Once #199 is implemented, then as an expansion, A Database GUI application image could be added in the docker-compose.yml file to allow more flexibility in actions against the database.

MVP

• setup chosen GUI (phpMyAdmin or Adminer) image in docker-compose.yml file
• link to db server
• update any relevant documentation for use of chosen GUI image in this context

Alternatives

At the moment the two viable options available to choose between are:

• phpMyAdmin
• Adminer

Additional context

Whichever image is chosen will be pulled from the official image on Docker Hub.

Implementation

• I would be interested in implementing this feature.