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.

CONTRIBUTING.md

@@ -0,0 +1,98 @@
+# Contributing to the Homelab Wiki
+
+## Voice
+
+Concise, technical, sysadmin-to-sysadmin. No marketing prose, no exclamation marks.
+
+## Page templates
+
+### Container page (`containers/<id>-<name>.md`)
+
+```markdown
+# <id> — `<name>`
+
+One-sentence purpose.
+
+## At a glance
+- **Hostname:** `<name>`
+- **IP:** `192.168.8.x`
+- **Privilege:** privileged | unprivileged
+- **Resources:** N cores / M GiB RAM / D GiB rootfs
+- **Mounts:** `/mnt/library` ↔ `/mnt/library` (if any)
+- **Public hostname:** `<sub>.hubris.network` (if proxied)
+
+## Role
+What it does, what it talks to.
+
+## Service / port map
+| Service | Listen | Notes |
+
+## Storage / config paths
+
+## Auto-deploy
+(if any) — link to [auto-deploy](../infrastructure/auto-deploy.md)
+
+## Related
+- [Caddy](121-caddy.md) (if proxied)
+- [DNS](../infrastructure/dns.md) (if has subdomain)
+- [Authentik](124-authentik.md) (if SSO)
+- ...
+
+## Changelog
+### YYYY-MM-DD — short title
+What changed, why, link to investigation if any.
+```
+
+### Cross-cutting page (`infrastructure/<topic>.md`)
+
+```markdown
+# <Topic>
+
+One-sentence summary.
+
+## Why
+Design rationale — what it replaces, what it solves.
+
+## Components
+Where it runs, what files matter.
+
+## How to apply / use
+Recipes.
+
+## Gotchas
+
+## Related
+Links to nodes that host or depend on this.
+
+## Changelog
+```
+
+### Investigation (`investigations/YYYY-MM-DD-slug.md`)
+
+```markdown
+# YYYY-MM-DD — <title>
+
+## Summary
+1-3 sentences.
+
+## Timeline
+
+## Root cause
+
+## Mitigations applied
+
+## Open questions
+```
+
+## Linking discipline
+
+- Every container page links to every cross-cutting page it participates in.
+- Every cross-cutting page lists the nodes that participate.
+- Every investigation links to the nodes it implicates *and* gets back-linked from each node's changelog.
+
+## Changelog hygiene
+
+- Reverse-chronological (newest first).
+- One entry per discrete change, even if you make several in one day.
+- If a change spans nodes, repeat the entry on each affected page (different perspective is fine).
+- Don't rewrite history — entries are append-only. Mistakes get a follow-up entry that supersedes them.