Andreas Hauser has the right link for the doc shared after the announcement that the webportal is unusable.
Here are the lines from the doc I believe we are both referring you to...
- Download the plutus-apps repository:
git clone https://github.com/input-output-hk/plutus-apps
- Go to the latest commit of the repository:
git checkout 7f53f18dfc788bf6aa929f47d840efa1247e11fd
Be sure to do step 2 in your newly cloned repo dir. Then run the nix-shell. That will take a bit the first time.
A successful commit will result in something like this on your console...
~/plutus-apps$ git checkout 7f53f18dfc788bf6aa929f47d840efa1247e11fd
Note: switching to '7f53f18dfc788bf6aa929f47d840efa1247e11fd'.
You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.
If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:
git switch -c <new-branch-name>
Or undo this operation with:
git switch -
Turn off this advice by setting config variable advice.detachedHead to false
HEAD is now at 7f53f18df Bump hls to 1.5.1 #209 (#232)
I hope that is helpful!
If someone sees an error in my answer, please correct me...and thanks!