Are you looking for the official SerenityOS website?
Go to http://serenityos.org/
This is where @hjalves host some unofficial SerenityOS related projects:
🠒 SerenityOS Q&A Compilation (https://qa.serenityos.dev/)
🠒 SerenityOS Nightly Builds (https://builds.serenityos.dev/)
This landing page is heavily (*cough cough*) inspired on @Xexxa's website at