Made everything needed to update firmware. Added the bundle to upload both front and backendin a bundle. Added magic number for more safety

Provider/main/api/ota/firmware.cpp

@@ -72,6 +72,21 @@ internal esp_err_t api_ota_firmware_handler(httpd_req_t *req)
       return ESP_FAIL;
     }
 
+    if (binary_file_len == 0 && recv_len > 0)
+    {
+      if ((uint8_t)buf[0] != 0xE9)
+      {
+        ESP_LOGE("OTA_FW", "Invalid magic: %02X. Expected 0xE9 for Firmware.",
+                 (uint8_t)buf[0]);
+        esp_ota_abort(update_handle);
+        free(buf);
+        httpd_resp_send_err(
+            req, HTTPD_400_BAD_REQUEST,
+            "Invalid file: This does not look like an ESP32 firmware binary.");
+        return ESP_FAIL;
+      }
+    }
+
     err = esp_ota_write(update_handle, (const void *)buf, recv_len);
     if (err != ESP_OK)
     {