Updated backend to make sure it works properly with frontend. Fixed one frontend issue (free heap was not correctly named)

Provider/main/main.cpp

@@ -107,6 +107,11 @@ extern "C" void app_main() {
   // Start the webserver
   web_server = start_webserver();
 
+  // Keep the main task alive indefinitely
+  while (true) {
+    vTaskDelay(pdMS_TO_TICKS(1000));
+  }
+
 shutdown:
   printf("Shutting down.\n");