Kleine wijzigingen, Docker best practises

distribution/docker-compose.yml

@@ -3,7 +3,7 @@
 #  however, you can use it as a guide to create a proper production environment.
 services:
    db:
-     image: mariadb
+     image: docker.io/library/mariadb:latest
      container_name: db
      environment:
      - MYSQL_ROOT_PASSWORD=123qwe