build(docker): remove web frontend build dependencies

- Remove web package.json install steps from Dockerfiles
- Remove web/dist copy from production build
- Remove web_node_modules volume from docker-compose

docker-compose.yml

@@ -36,7 +36,6 @@ services:
       - .:/app
       # Use named volumes for node_modules (prevents host overwrite + caches deps)
       - app_node_modules:/app/node_modules
-      - web_node_modules:/app/web/node_modules
     environment:
       - HOST=0.0.0.0
       - DB_USER=${DB_USER}
@@ -92,5 +91,3 @@ volumes:
   # Named volumes for node_modules caching
   app_node_modules:
     name: aurora_app_node_modules
-  web_node_modules:
-    name: aurora_web_node_modules