fix backup label

compose.forgejo.yml

@@ -2,4 +2,4 @@ version: '3.8'
 
 services:
   app:
-    image: codeberg.org/forgejo/forgejo:1.19.3-0-rootless
+    image: codeberg.org/forgejo/forgejo:1.20.1-0-rootless

compose.mariadb.yml

@@ -9,6 +9,12 @@ services:
       - GITEA_DB_USER=gitea
   db:
     image: "mariadb:10.11.2"
+    deploy:
+      labels:
+          backupbot.backup: "true"
+          backupbot.backup.pre-hook: 'mysqldump --single-transaction -u root -p"$$(cat /run/secrets/db_root_password)" gitea > /var/lib/mysql/backup.sql'
+          backupbot.backup.post-hook: "rm -rf /var/lib/mysql/backup.sql"
+          backupbot.backup.path: "/var/lib/mysql/backup.sql"
     command: |
       mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
     environment:

compose.postgres.yml

@@ -9,6 +9,12 @@ services:
       - GITEA_DB_USER=gitea
   db:
     image: postgres:15.3
+    deploy:
+      labels:
+          backupbot.backup: "true"
+          backupbot.backup.pre-hook: "PGPASSWORD=$$(cat $${POSTGRES_PASSWORD_FILE}) pg_dump -U $${POSTGRES_USER} $${POSTGRES_DB} > /var/lib/postgresql/data/backup.sql"
+          backupbot.backup.post-hook: "rm -r /var/lib/postgresql/data/backup.sql"
+          backupbot.backup.path: "/var/lib/postgresql/data"
     environment: 
       - POSTGRES_DB=gitea
       - POSTGRES_USER=gitea

compose.yml

@@ -48,6 +48,7 @@ services:
         failure_action: rollback
         order: start-first
       labels:
+        - "backupbot.backup=true"
         - "traefik.enable=true"
         - "traefik.http.routers.${STACK_NAME}.rule=Host(`${DOMAIN}`)"
         - "traefik.http.routers.${STACK_NAME}.entrypoints=web-secure"