fix: mount Git-managed Sentinel frontend assets

backup-monitor/compose.yaml

@@ -4,12 +4,12 @@ networks:
 
 services:
   backup-monitor:
-    build:
-      context: ../backup-monitor
-    image: backup-sentinel:local
-    pull_policy: build
+    build: ../backup-monitor
     container_name: backup-monitor
     restart: always
+    volumes:
+      - ./templates:/app/templates:ro
+      - ./static:/app/static:ro
     ports:
       - "9999:9999"
     environment: