Tailscale :stable pulled v1.96.5 during last deploy, which returns
SERVFAIL for tailnet DNS names (no upstream resolvers set). This broke
all public routing (forge/docs/cv.eblu.me) through the Fly proxy.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
## Summary
- Adds a branded 503 error page served when upstreams are unreachable (indri offline, Tailscale tunnel down, emergency shutoff, etc.)
- Stale cache is still served first when available (`proxy_cache_use_stale` takes priority)
- Test endpoint at `docs.eblu.me/_error` to preview the page without killing upstreams
- `proxy_intercept_errors on` also catches error responses returned by the upstream itself
## Files Changed
- `fly/error.html` — Self-contained error page (dark theme, links to BlumeOps repo)
- `fly/nginx.conf` — `error_page`, `internal` location, `/_error` test location, `proxy_intercept_errors`
- `fly/Dockerfile` — COPY error.html into image
## Test Plan
- [ ] Deploy to Fly.io
- [ ] Visit `docs.eblu.me/_error` to verify the page renders
- [ ] Optionally stop indri/Tailscale to confirm the page shows on real 502/503/504
Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/133
## Summary
- Adds a Fly.io reverse proxy (`blumeops-proxy`) that tunnels public traffic to homelab services over Tailscale
- First service exposed: `docs.eblu.me` — the Quartz static docs site
- Includes Pulumi IaC for Tailscale auth key/ACLs and Gandi DNS CNAME
- Adds mise tasks (`fly-deploy`, `fly-setup`, `fly-shutoff`) and Forgejo CI workflow
## Key details
- Fly.io Firecracker VMs support TUN devices natively — no userspace networking needed
- Tailscale auth key is `preauthorized=True` to avoid device approval hangs on container restarts
- nginx caches aggressively for the static site; health check is on the default_server block
- ACLs restrict `tag:flyio-proxy` to `tag:k8s` on port 443 only
- DNS CNAME deployed and verified: `docs.eblu.me` → `blumeops-proxy.fly.dev`
## Test plan
- [x] `curl -sf https://blumeops-proxy.fly.dev/healthz` returns `ok`
- [x] `curl -I -H "Host: docs.eblu.me" https://blumeops-proxy.fly.dev/` returns 200 with `X-Cache-Status`
- [x] `curl -I https://docs.eblu.me/` returns 200 with valid Let's Encrypt cert
- [x] `dig forge.ops.eblu.me` still resolves to 100.98.163.89 (private services unaffected)
- [x] Set `FLY_DEPLOY_TOKEN` Forgejo Actions secret for CI auto-deploy
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/120
