Merge pull request #168 from cschug/pin_version_nextcloud

Pin version of Nextcloud and its MariaDB

docker-compose/nextcloud/docker-compose.yaml

@@ -4,7 +4,7 @@ volumes:
   nextcloud-db:
 services:
   nextcloud-app:
-    image: nextcloud:latest
+    image: docker.io/library/nextcloud:28.0.3-apache
     container_name: nextcloud-app
     ports:
       - 80:80
@@ -17,7 +17,9 @@ services:
       - MYSQL_HOST=nextcloud-db
     restart: unless-stopped
   nextcloud-db:
-    image: mariadb:latest
+    # See compatibility matrix for Nextcloud 28
+    # https://docs.nextcloud.com/server/28/admin_manual/installation/system_requirements.html
+    image: docker.io/library/mariadb:10.6.17
     container_name: nextcloud-db
     command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
     volumes: