Bootstrap Homelab-Docs wiki

Initial documentation of the hubris Proxmox homelab as a cross-linked
markdown wiki. Per-node pages, cross-cutting infrastructure pages, an
investigation log, and an operations cheatsheet. Each node and topic
ends with a Changelog section so changes can be tracked in-place going
forward.

Refreshed against live state on 2026-04-28 — 14 active LXCs (109
syncthing currently stopped) + 1 VM (108 haos). Reflects post-A/B-test
state of the 2026-04-21 hubris crash-loop investigation.

containers/118-elementsynapse.md

@@ -0,0 +1,32 @@
+# 118 — `elementsynapse`
+
+Matrix homeserver (Synapse). Backs `@dtoro:avispero` and `@claudio:avispero`.
+
+## At a glance
+- **Hostname:** `elementsynapse`
+- **IP:** `192.168.8.239`
+- **Privilege:** **unprivileged**
+- **Resources:** 1 core / 2 GiB RAM / 8 GiB rootfs
+- **Mounts:** none from `/mnt/library`
+- **Public hostname:** [`matrix.hubris.network`](../infrastructure/dns.md) → [caddy](121-caddy.md) → `:8008`
+- **`server_name`:** `avispero` (intentionally different from the public URL).
+
+## Service / port map
+
+| Service        | Listen  | Notes                            |
+| -------------- | ------- | -------------------------------- |
+| synapse        | `:8008` | Matrix client-server / federation HTTP. Caddy terminates TLS for `matrix.hubris.network`. |
+
+## Known issues
+- Disk usage was 86.8% at last claudio-monitor reading on 2026-04-21 — the Matrix DB grows steadily. Watch or grow rootfs.
+
+## Related
+- [claudio-bot (123)](123-claudio-bot.md) — connects directly to `192.168.8.239:8008` (avoids hairpin-NAT TLS issue on the public URL)
+- [Caddy](121-caddy.md)
+- [DNS](../infrastructure/dns.md)
+- [Monitoring](../infrastructure/monitoring.md)
+
+## Changelog
+
+### 2026-04-28 — wiki entry created
+Initial documentation.