Upload index.js

server/index.js

@@ -10,7 +10,10 @@ const Dataset = require('./models/Dataset');
 dotenv.config();
 
 const app = express();
-const PORT = process.env.PORT || 3001;
+// Use port 8501 for Hugging Face Spaces, or 3001 for local development
+// Check multiple environment variables that might indicate Hugging Face Spaces
+const isHuggingFaceSpaces = process.env.HF_SPACES === 'true' || process.env.HF_SPACES === true || !!process.env.HF_SPACES;
+const PORT = isHuggingFaceSpaces ? 8501 : (process.env.PORT || 3001);
 
 // Enable CORS for all origins in development, specific origins in production
 if (process.env.NODE_ENV === 'development') {