Discustom is an open-source project on GitHub. It started as a CLI tool using static files and task scheduler, but has since evolved. You can find more details and source code on its GitHub repository.
Either run it from the app.py or you can build it.
python app.py/build.py
or you can download pre-built binaries from the Github Repo, and run it.
if you're building it or running it from app.py then you will have to install the required modules
(the list is shown on the repo page)