[Docker] Mysql backup + PHPMyAdmin service

[mfdeveloper]

I've added docker compose improvements with more features:

• Added new service phpmyadmin to manager your mysql database

• Create a new Dockerfile for wp-cli to execute wordpress database actions. For this, is required share the wp-config.php file among services, and containers S.O user permissions. See this issue: docker-library/wordpress#256

• Added new volumes (e.g wp-src to point to wordpress source code)

• Created a backup folder and a mysql.sh script to generate/restore backup files

  PS: I think that is better a node.js implementation for this (cross-platform support), maybe using like a totally separated repo and npm package. But, that request more time, and the shell script added in this PR solves by now!

• Updated README.md with docker backup functions

[lyzs90]

Thanks for this pr. I'm not sure if we should include database management in this project because the scope was intended to be purely for the view layer, just like other wordpress themes. The docker setup you see is just to facilitate development

I'll close and tag this PR as tutorial so others who are keen to use phpmyadmin can find it

[mfdeveloper]

Hi @lyzs90 ! Thank you for your feedback. I understand your concerns...so, maybe will be better keep a completelly separated repo with vuewp theme (e.g. like a wpackagist composer package) and other repo containing the wp docker and compose files. The tutorial tag is a good "start point", but I think that separated repos can be more concise and more flexible for accept PR's. Moreover, you can add a CONTRIBUTING guide with details about NOT create PR's for here with docker improvements.

I'm using wp docker environment approach + vue themes, and separated repos seems a better strategy for me :)