Mount source code volume for development hot-reload

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -61,6 +61,8 @@ services:
       # L2_SERVER, L2_DOMAIN, IPFS_GATEWAY_URL from .env file
     volumes:
       - l1_cache:/data/cache
+      # Mount source code for development - restart service to pick up changes
+      - .:/app
     depends_on:
       - redis
       - postgres
@@ -87,6 +89,8 @@ services:
       - ARTDAG_CLUSTER_KEY=${ARTDAG_CLUSTER_KEY:-}
     volumes:
       - l1_cache:/data/cache
+      # Mount source code for development - restart service to pick up changes
+      - .:/app
     depends_on:
       - redis
       - postgres