The app is the only process on this box accepting unauthenticated input from
the internet and it was running as root in a writable container. Now uid 10001,
read_only with a tmpfs /tmp, cap_drop ALL and no-new-privileges. Host-side
/srv/scout-website/data and the service account key are chowned to 10001.
Verified on a throwaway container: every route, the admin API, spam rejection,
and a real submission writing to both the jsonl and SQLite.
thethreemagi
985253422d