fix: revert nginx.conf to non-demo config, finalize demo compose

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.demo.yml

@@ -2,9 +2,8 @@
 # Deploy via Portainer: Web editor -> paste this, or deploy from repo
 # Access at http://localhost:4848 (or your host:4848)
 #
-# Required: Set ANTHROPIC_API_KEY for AI chat to work
-# In Portainer: Add as environment variable when deploying
-# Locally: ANTHROPIC_API_KEY=sk-ant-... docker compose -f docker-compose.demo.yml up --build
+# Required: Set ANTHROPIC_API_KEY in environment or .env file for chat to work
+# Optional: Chat will show fallback message if no key is set
 
 services:
   neode-backend:
@@ -23,10 +22,10 @@ services:
       context: .
       dockerfile: neode-ui/Dockerfile.web
     container_name: archy-demo-web
-    ports:
-      - "4848:80"
     environment:
       ANTHROPIC_API_KEY: ${ANTHROPIC_API_KEY:-}
+    ports:
+      - "4848:80"
     depends_on:
       - neode-backend
     restart: unless-stopped

neode-ui/docker/nginx.conf

@@ -75,4 +75,3 @@ http {
         }
     }
 }
-