enable mariadb auto upgrade

This fixes after-upgrade issues, for example:

    [ERROR] Incorrect definition of table mysql.event: expected column 'definer' at position 3 to have type varchar(, found type char(141).

The upgrade only happens when necessary.

I also disabled the system database backup because I assume users create
and test their own backups.

Signed-off-by: Adam Monsen <haircut@gmail.com>

.examples/docker-compose/insecure/mariadb/apache/docker-compose.yml

@@ -9,6 +9,8 @@ services:
       - db:/var/lib/mysql
     environment:
       - MYSQL_ROOT_PASSWORD=
+      - MARIADB_AUTO_UPGRADE=yesplease
+      - MARIADB_DISABLE_UPGRADE_BACKUP=yesplease
     env_file:
       - db.env
 

.examples/docker-compose/insecure/mariadb/fpm/docker-compose.yml

@@ -9,6 +9,8 @@ services:
       - db:/var/lib/mysql
     environment:
       - MYSQL_ROOT_PASSWORD=
+      - MARIADB_AUTO_UPGRADE=yesplease
+      - MARIADB_DISABLE_UPGRADE_BACKUP=yesplease
     env_file:
       - db.env
 

.examples/docker-compose/with-nginx-proxy/mariadb/apache/docker-compose.yml

@@ -9,6 +9,8 @@ services:
       - db:/var/lib/mysql
     environment:
       - MYSQL_ROOT_PASSWORD=
+      - MARIADB_AUTO_UPGRADE=yesplease
+      - MARIADB_DISABLE_UPGRADE_BACKUP=yesplease
     env_file:
       - db.env
 

.examples/docker-compose/with-nginx-proxy/mariadb/fpm/docker-compose.yml

@@ -9,6 +9,8 @@ services:
       - db:/var/lib/mysql
     environment:
       - MYSQL_ROOT_PASSWORD=
+      - MARIADB_AUTO_UPGRADE=yesplease
+      - MARIADB_DISABLE_UPGRADE_BACKUP=yesplease
     env_file:
       - db.env