This should be straightforward; we have code infirmware-esp32/ and we want an instructions file at firmware-esp32/README.md which describes how to load code onto the device.

This may increase in complexity over time, but for now can mostly replicate the instructions at https://github.com/espressif/esp-idf-template, e.g:

## Getting started

* Plug in your ESP32 Thing.
* Run the makefile.
* Load it onto the device.
* Expect $THIS_THING to happen.

### Troubleshooting

Possible errors with drivers? etc. Follow these instructions: $INSTRUCTIONS_URL