fix: route /v1/ to gateway for chat API

start.sh

@@ -95,6 +95,8 @@ python3 /app/health_server.py &
 echo "[boot] Health server PID: $!"
 
 echo "[boot] Starting nginx..."
+sed -i "s|location /health|location /v1/ { proxy_pass http://127.0.0.1:8081; proxy_http_version 1.1; proxy_set_header Host \$host; }
+    location /health|" /etc/nginx/sites-available/default
 nginx
 
 echo "[boot] Starting Ollama..."