Added required library to ESP32 setup

01OS/01OS/clients/esp32/README.md

@@ -4,8 +4,9 @@ To set up audio recording + playback on the ESP32 (M5 Atom), do the following:
 
 1. Open Arduino IDE, and open the `client/client.ino` file
 2. Go to Tools -> Board -> Boards Manager, search "esp32", then install the boards by Arduino and Espressif
-3. Go to Tools -> Manage Libraries, then install the following:
+3. Go to Tools -> Manage Libraries, then install the following (_with_ dependencies, if it prompts you to install with/without dependencies):
     - M5Atom by M5Stack
     - WebSockets by Markus Sattler
+    - ESPAsyncWebServer by lacamera
 4. The board needs to connect to WiFi. Once you flash, connect to ESP32 wifi "captive" which will get wifi details. Once it connects, it will ask you to enter 01OS server address in the format "domain.com:port" or "ip:port". Once its able to connect you can use the device.
 5. To flash the .ino to the board, connect the board to the USB port, select the port from the dropdown on the IDE, then select the M5Atom board (or M5Stack-ATOM if you have that). Click on upload to flash the board.