feat: nextcloud backup script

nextcloud/backup.sh

@@ -0,0 +1,6 @@
+source .env
+CONTAINER_APP=app
+docker compose exec $CONTAINER_APP ./occ maintenance:mode --on
+docker compose exec $MYSQL_HOST sh -c "mariadb-dump --single-transaction -h $MYSQL_HOST -u $MYSQL_USER --password=$MYSQL_PASSWORD $MYSQL_DATABASE > backup/nextcloud-sqlbkp_`date +'%Y%m%d'`.bak" \
+	&& echo "SQL dump saved"
+docker compose exec $CONTAINER_APP ./occ maintenance:mode --off

nextcloud/docker-compose.yml

@@ -5,11 +5,12 @@ services:
     command: --transaction-isolation=READ-COMMITTED --binlog-format=ROW
     volumes:
       - ./db:/var/lib/mysql
+      - ./backup:/backup
     env_file: 
-      - env
+      - .env
 
   app:
-    image: nextcloud
+    image: nextcloud:stable
     restart: always
     ports:
       - 50000:80
@@ -18,4 +19,4 @@ services:
     volumes:
       - ./nextcloud:/var/www/html
     env_file: 
-      - env
+      - .env