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docs(deploy): replace globals overlay description with script overlays

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deploy/README.md still described the deleted managed-global overlays as
the second overlay surface. Replace with a description of script
overlays (bubblewrap + systemd-run sandbox, resource caps).

Full test sweep: 367 passing, 2 skipped across l4d2web, l4d2host, deploy.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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mwiegand 2026-05-08 15:56:24 +02:00
parent e51a4d58a4
commit 1e62a44c16
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deploy/README.md
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@ -68,6 +68,6 @@ Invalid references are rejected:
The web app currently supports two overlay surfaces:
- `workshop` overlays (user-owned) — populated by downloading `.vpk` files from the public Steam Web API into `${LEFT4ME_ROOT}/workshop_cache/{steam_id}.vpk` and creating absolute symlinks under `${LEFT4ME_ROOT}/overlays/{overlay_id}/left4dead2/addons/{steam_id}.vpk`.
- Managed global overlays (`l4d2center_maps`, `cedapug_maps`, system-wide) — populated by the daily `left4me-refresh-global-overlays` job, which downloads archives into `${LEFT4ME_ROOT}/global_overlay_cache/` and symlinks them into the overlay directory.
- `script` overlays — populated by an arbitrary user-authored bash script that runs inside `bubblewrap` + `systemd-run --scope` as the unprivileged `l4d2-sandbox` UID, with the overlay directory bind-mounted RW at `/overlay`. Resource caps: 1h walltime, 4 GB RAM, 512 tasks, 200% CPU, 20 GB post-build disk cap.
Both the caches and the overlay directories are owned by the `left4me` runtime user; if the web service ever runs as a different uid, ensure it shares a group with the host process and that both trees are group-readable.