Update services

Revert "Create a new image for mariadb which sets uid for mysqld to 1000"

Revert "Add a more detailed description for mysql-uid-1000"

Add a more detailed description for mysql-uid-1000

Create a new image for mariadb which sets uid for mysqld to 1000

Remove the "htdocs" container, create bind mount for htdocs/ in "php" instead

Update docker-compose.yml to version 2 format

php: Set TYPO3_CONTEXT

storage: Fix volume path

Install php-redis

Install Redis

htdocs: Update db credentials in test.php

Ignore mysql/

db: Store database on the host

db: Change root password