The previous instructions used `--from-repofile=/dev/stdin` with a
heredoc, which fails because dnf copies the source file and /dev/stdin
is not a regular file. Host the .repo files on the deployed site and
update the docs to use `--from-repofile=https://...` instead.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
