Add documentation on running a containerized wifi-connect instance on a device running Raspberry Pi OS Lite.

[nicomiguelino]

Overview

• The documentation (as per README.md) shows a sample docker-compose.yml, but it only works for instances running BalenaOS.

Next Steps

• Add a section in README.md that shows how to setup a containerized wifi-connect instance on a Raspberry Pi device running RPi OS Lite.
• If necessary, create a Dockerfile for the use case.

[ScottGibb]

Has there been any updates regarding this?