fixed the 'program to big' error by flashing the ESPUI website files to SPIFFS

analog_system_monitor_arduino/analog_system_monitor_arduino.ino

@@ -1,3 +1,12 @@
+//
+// IMPORTANT:
+//  before flashing this the first time,
+//  upload the "prepareFilesystem.ino" example sketch from ESPUI
+//  without that critical files are missing
+//
+//  This was done to reduce the PROGMEM footprint of this program
+//
+
 #include <Arduino.h>
 #include <WiFi.h>
 #include <WiFiManager.h>
@@ -48,7 +57,7 @@ void setup() {
   uiInit(tabSettings, tabLighting, tabCalibration);
 
   ESPUI.sliderContinuous = true;   // enables live slider updates
-  ESPUI.begin("Analog Monitor UI");
+  ESPUI.beginLITTLEFS("Analog System Monitor UI");
 }
 
 void loop() {