The Forgejo Actions cache server at 172.18.0.27:41161 isn't reachable
from the test-web runner container; setup-node sat there waiting for
ETIMEDOUT each run. Drop `cache: 'npm'` so the step finishes in seconds.
`npm ci` still works deterministically from package-lock.json — net cost
is ~10-30s of registry fetch vs. 4m41s of timeout. Restore the cache
option once the runner-host network reaches the cache server (separate
operator task).