feat: standalone frontend uses production build instead of dev server

Override web service in docker-compose.standalone.yml to build from
www/Dockerfile (multi-stage: deps → build → standalone runner) instead
of running pnpm dev with bind-mounted source.

COMPOSE_STANDALONE_TODO.md

@@ -0,0 +1,10 @@
+# Standalone Compose: Remaining Production Work
+
+## Server/worker/beat: remove host network mode + bind mounts
+
+Currently `server` uses `network_mode: host` and all three services bind-mount `./server/:/app/`. For full standalone prod:
+
+- Remove `network_mode: host` from server
+- Remove bind-mount volumes from server, worker, beat (use built image only)
+- Update `compose_cmd` in `setup-standalone.sh` to not rely on host network
+- Change `SERVER_API_URL` from `http://host.docker.internal:1250` to `http://server:1250` (server reachable via Docker network once off host mode)

docker-compose.standalone.yml

@@ -76,6 +76,15 @@ services:
       DIARIZATION_BACKEND: modal
       DIARIZATION_URL: http://cpu:8000
 
+  web:
+    image: reflector-frontend-standalone
+    build:
+      context: ./www
+    command: ["node", "server.js"]
+    volumes: !reset []
+    environment:
+      NODE_ENV: production
+
   cpu:
     build:
       context: ./gpu/self_hosted