fixxed main bp error

app/routes/main.py

@@ -16,6 +16,11 @@ def index():
     return render_template('index.html', configs=load_configs())
 """
 
+@main_bp.route('/configs/<path:filename>')
+def serve_config_file(filename):
+    return send_from_directory(app.config['CONFIG_DIR'], filename)
+    
+
 @main_bp.route('/load_config/<filename>')
 def load_config(filename):
     global current_config