Find code and diagrams at: https://www.EliTheComputerGuy.com
Using an Ethernet Shield you can run a simple web server from an Arduino.
Note: The Micro SD card must be formatted as FAT.
Functional Parts in the Project:
Arduino Uno – https://store.arduino.cc/usa/arduino-uno-rev3
Arduino Ethernet Shield 2 – https://store.arduino.cc/usa/arduino-ethernet-shield-2
Micro SD Card