Merge branch 'add-docker' into 'master'

config/redirects_www.example.com.json.dist

docker/.env

docker/containers/db-server/mariadb/my.cnf

docker/containers/web-server/Dockerfile

...containers/web-server/apache/sites-enabled/vhost_app.conf

docker/containers/web-server/php/extra-php-config.ini

docker/docker-compose.yml

docker/init.sh

docker/init.sh.cfg

docker/templates/docker-compose.yml

docker/templates/dot_env

docker/templates/extra-php-config.ini

docker/templates/my.cnf

docker/templates/readme.md

docker/templates/vhost_app.conf

docker/templates/web-server-Dockerfile

docs/10_📑_Description.md

docs/40_🖥️_Web_ui.md

docs/images/admin_ui.png

public_html/admin/index.php