They changed the URL for the last World Championships. The site is still online, but the Content isn't: https://roadto.de/
However: I know the guys who made this site. They are from a german athletics message board. And I'm pretty sure they won't continue to update the site. It was much easier to update the ranking by PB than do the World Ranking. I don't know for sure, but I think it's unlikely that they will continue to update the list.
If they do, they'll probably do a Road to Doha first and start the Road to Tokyo at some Point after the World Championships.