Any recommended sites for documenting a project?

Hi folks,
I have been working on a light sensor using ESP8266 with a TSL2591 which sends data via MQTT to my emonbase, where a NodeRed flow uses the lightwaveRF to turn a socket on. This is version 3 of my light sensor, v2 using a pi Zero is here.

I want to start documenting it, and originally assumed I would post it here in OEM Community, but then I started to think it might be quite a long posting, as I wanted to include some of what I learned in doing the project, and I didn’t want to be abusing the purpose of this community, as the project isn’t using many of the OEM components. I wondered if I should document it somewhere else? And if so, any recommendations for sites / places for documenting a little project?