Move server datadir to /srv/mariadb/

docker-compose/docker-compose.yaml

@@ -17,7 +17,7 @@ services:
     healthcheck:
       test: ['CMD', "healthcheck.sh", "--connect", "--innodb_initialized"]
     volumes:
-      - ./mariadb:/var/lib/mysql:rw
+      - /srv/mariadb:/var/lib/mysql:rw
       - ./mariadb-config/dev/mariadb.cnf:/etc/mysql/conf.d/mariadb.cnf:ro
     logging:
       driver: journald