Add a route to upload update to the platform

esp32_device/README.md

@@ -1,3 +1,17 @@
 # ESP32 device
 
 ESP32 client device, using `W32-ETH01` device
+
+## Some commands
+
+Create a new firmware build:
+
+```bash
+idf.py build
+```
+
+Upload firmware to central backend, in dev mode:
+
+```bash
+curl -k -X POST  https://localhost:8443/web_api/ota/Wt32-Eth01/$(cat version.txt) --form firmware="@build/main.bin"
+```