Update app.py

app.py

@@ -1,30 +1,32 @@
 import os
 from flask import Flask, send_from_directory
 
+# Initialize Flask, pointing it to the Vite output directory
 app = Flask(__name__, static_folder='dist')
 
-# 1. Health Check Endpoint
 @app.route('/health')
 def health_check():
+    """Hugging Face readiness probe endpoint."""
     return {"status": "healthy", "version": "15.0.0"}, 200
 
-# 2. Production Routing Logic
 @app.route('/', defaults={'path': ''})
 @app.route('/<path:path>')
 def serve(path):
-    # Ensure the static folder exists
+    """
+    Serve static files. If a file is not found (e.g., during client-side routing),
+    fallback to index.html to allow React Router to handle the view.
+    """
     static_path = os.path.join(app.static_folder, path)
     
     if path != "" and os.path.exists(static_path):
         return send_from_directory(app.static_folder, path)
     else:
-        # Check if index.html exists before serving to prevent 500 errors
         index_path = os.path.join(app.static_folder, 'index.html')
         if os.path.exists(index_path):
             return send_from_directory(app.static_folder, 'index.html')
         else:
-            return f"Abyssinia v15 Error: Build artifacts not found in {app.static_folder}", 404
+            return f"Abyssinia v15 Error: Build artifacts not found in {app.static_folder}. Check Docker build stage.", 404
 
 if __name__ == "__main__":
-    # Fallback for local testing; Hugging Face will use Gunicorn
+    # Local testing fallback; Hugging Face will invoke via Gunicorn instead
     app.run(host='0.0.0.0', port=7860)