Update dashboard and Docker compose

docker-compose.dev.yml

@@ -34,6 +34,8 @@ services:
 
   dashboard:
     build:
+      context: .
+      dockerfile: Dockerfile
       target: development
     image: guardden-dashboard:dev
     container_name: guardden-dashboard-dev
@@ -45,6 +47,8 @@ services:
       # Mount source code for hot reloading
       - ./src:/app/src:ro
       - ./migrations:/app/migrations:ro
+      # Serve locally built dashboard assets (optional)
+      - ./dashboard/frontend/dist:/app/dashboard/frontend/dist:ro
     command: ["python", "-m", "guardden.dashboard", "--reload", "--host", "0.0.0.0"]
     ports:
       - "8080:8000"
@@ -110,4 +114,4 @@ services:
 
 volumes:
   postgres_dev_data:
-  pgadmin_data:
+  pgadmin_data: