Add esp32 pinout image

ESP32-Dev-Board.md

@@ -5,3 +5,6 @@ I am using a ESP32 dev board because of the low cost, built-in wifi, and compati
 [Hiletgo Product Page](http://www.hiletgo.com/ProductDetail/1906566.html)
 
 [Amazon Link](https://www.amazon.com/HiLetgo-ESP-WROOM-32-Development-Microcontroller-Integrated/dp/B0718T232Z)
+
+### Pinout
+![ESP32 Pinout]("resources/images/Hitletgo ESP32 Pinout.jpg")