Regarding the website it's actually not existing but planned.
First bulletpoint under "Future projects" for you the english version here: https://www.berwang.tirol/innovations
German version: https://www.berwang.tirol/de/skiarena-berwang/neuerungen-bautagebuch

I've changed it to proposed:* here: https://www.openstreetmap.org/changeset/138942395