Moved index.html from SPIFFS to program memory. Removed dependencies to SPIFFS. Also, we can use a different partition scheme with much more program space instead of reserving some of it for SPIFFS.

include/main.h

@@ -1,4 +1,5 @@
 #pragma once
 
-extern uint16_t spiffs_version;
 void wifi_connect();
+
+extern const uint8_t file_index_html_start[] asm("_binary_src_index_html_start");

include/updater.h

@@ -4,7 +4,7 @@
 
 class Updater {
 public:
-	static void run(uint16_t spiffs_version = 0);
+	static void run();
 	static bool do_update(int cmd, String url, String expected_md5);
 	static bool read_line(String* dst, HTTPClientWrapper* http, String expected_key);
 };