And there is an issue tracker. https://github.com/divSelector/divchan/issues
I haven't really written a CONTRIBUTING file yet but if you're interested in adding something post an issue.
I wrote a build guide for people who want to contribute to the working on the source code of this site. https://github.com/divSelector/divchan?tab=readme-ov-file#build-guide
Here are some visual aids for Windows users.
Notice here I am right clicking in the folder and selecting, "Open in Terminal"
One thing I noticed is that Docker Desktop for Windows does not seem to broadcast on 0.0.0.0 but you can still access the link at http://localhost:8000
Keep in mind when you modify the code, the changes will not update on the localhost site until you bring the docker containers down and rebuild. This means you can't just hit Play in Docker Desktop.
If you have questions, lmk.