Update Readme

README.md

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-# jellyfin
+# Jellyfin
+
+Self-hosted media server for organizing and streaming movies, television, music, and other media.
+
+## Deployment layout
+
+- **Compose:** `/srv/docker/jellyfin/docker-compose.yml`
+- **Static configuration/source:** no additional static configuration or build source
+- **Non-secret environment:** none; there is no project-local `.env`
+- **Secrets:** none; credentials and authentication state created through Jellyfin are application-managed state
+- **NVMe application state:** `/srv/appdata/jellyfin/config` and `/srv/appdata/jellyfin/cache`
+- **Bulk HDD data:** `/data/Data1/jellyfin`
+- **Other mounts:** `/dev/dri` is passed through for hardware acceleration, with supplemental host group IDs
+`44` and `993`
+
+Secrets are never committed to this repository. No separate deployment secret
+file is declared; sensitive application-managed state is stored under
+`/srv/appdata/jellyfin/config`.
+
+## Dependencies and recovery
+
+- **Networks/dependencies:** Jellyfin uses the external `npm_proxy` network at `192.168.97.10` and the host `/
+dev/dri` device for hardware acceleration; no dependent services are declared
+- **Back up:** `/srv/appdata/jellyfin/config` and the separately managed media under `/data/Data1/jellyfin`
+- **Re-creatable:** the Jellyfin container and `/srv/appdata/jellyfin/cache`