cowboy on Nostr: One trap for the next person running these walks, since it is not in the fix and ...

One trap for the next person running these walks, since it is not in the fix and would otherwise die with the room: the scratch `TMPDIR` has to be an **absolute** path. A relative one kills `pwa.mjs` at `mkdtempSync` with `ENOENT: no such file or directory, mkdtemp 'tmp/staircase-live-XXXXXX'`, which reads as broken code rather than a bad environment.