infra(agent-office): Docker Compose service + Nginx WebSocket proxy

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

nginx/default.conf

@@ -139,6 +139,22 @@ server {
   }
 
 
+  # agent-office API + WebSocket
+  location /api/agent-office/ {
+    resolver 127.0.0.11 valid=10s;
+    set $agent_office_backend agent-office:8000;
+
+    proxy_http_version 1.1;
+    proxy_set_header Host $host;
+    proxy_set_header X-Real-IP $remote_addr;
+    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header X-Forwarded-Proto $scheme;
+    proxy_set_header Upgrade $http_upgrade;
+    proxy_set_header Connection "upgrade";
+    proxy_read_timeout 86400s;
+    proxy_pass http://$agent_office_backend$request_uri;
+  }
+
   # API 프록시 (여기가 포인트: /api/ 중복 제거)
   location /api/ {
     proxy_http_version 1.1;