docs(readme): gateway shipped in 26.21-alpha, roadmap + key decision

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -56,7 +56,7 @@ Furtka aims to be:
 | Identity provider | Authentik | Bundled SSO from day one — every app template auto-wires to it at install |
 | Managed gateway DNS | NS delegation to `ns1.furtka.org` | User delegates once at registrar; we handle wildcard cert + subdomain creation |
 | Local HTTPS | Local CA | One-click CA install → green padlock on every service, no browser warnings |
-| Gateway | Flexible | Own reverse proxy OR managed through our infrastructure |
+| Gateway | Traefik + wg-easy ([furtka-gateway](https://forgejo.sourcegate.online/robert/furtka-gateway)) | Decided 2026-10-23. Self-hosted on any VPS with a public IPv4 via `deploy.sh`, or managed through our infrastructure later. Boxes dial out over WireGuard, so no port forwarding at home. |
 | UI approach | UI-first | Design the simplest possible UI, then build everything to match |
 
 ## Landscape (Existing Projects)
@@ -122,10 +122,13 @@ None of these nail the "your dad can set this up" experience. The installer wiza
 - [x] **Phase 2 Furtka self-update** — `/settings` → Check → Update now. Downloads signed tarball (SHA256), stages, atomic symlink flip, reloads Caddy, daemon-reload, restarts services, health-checks the new api with auto-rollback on failure. CLI: `furtka update [--check]` + `furtka rollback`. Validated end-to-end on VM 2026-04-16 (`26.0-alpha` → `26.3-alpha` → rollback → reboot).
 - [x] **Local HTTPS Phase 1** — Caddy `tls internal` on `:443` is fully opt-in via the `/settings` toggle (26.15-alpha); fresh installs stay HTTP-only so a half-trusted cert chain can't lock the user out. Per-box root CA generated on first enable, `rootCA.crt` downloadable from `/settings`, per-OS install guide at `/https-install/`. The "force HTTPS" sub-toggle still only appears once the current browser already trusts the cert.
 - [x] **Post-build smoke VM on Proxmox** — `.forgejo/workflows/build-iso.yml` hands the freshly built ISO to `scripts/smoke-vm.sh`, which boots it in a throwaway VM on `pollux` (192.168.178.165) and curls the webinstaller on `:5000`. VMID range 9000–9099, last 5 kept. Green end-to-end since 26.4-alpha.
+- [x] **Furtka Gateway (Access Gate)** — boxes behind NAT/CGNAT register with a [furtka-gateway](https://forgejo.sourcegate.online/robert/furtka-gateway) server (Traefik + wg-easy + control plane) over a WireGuard tunnel; Settings → *Furtka Gateway* connects, Apps → ⋯ → *Expose to Internet* publishes an app under its own hostname with Let's Encrypt. Only apps with `internet.viable: true` in the manifest can be exposed. Shipped in `26.21-alpha`; first gateway running at `gw.furtka.org` (Hetzner, 2026-10-23).
+- [x] **`26.21-alpha`** — security fixes (app-name validation, `.env` injection, fail-closed `users.json`, API hardening), installer fixes, Mark M logo, furtka.org/download, on-box UI polish. See [CHANGELOG](CHANGELOG.md).
+- [ ] Gateway dogfooding on real hardware — two old laptops as boxes, one per brother, both behind CGNAT
 - [ ] Installer wizard screens S3–S7 — per-device purpose, network, domain, SSL, diagnostic. S5/S6 blocked on managed-gateway DNS infra not yet built.
 - [ ] Local HTTPS Phase 2 — dedicated local CA (not Caddy's `tls internal`), streamlined one-click install across Win/Mac/Linux/Android, and HTTPS on the live-installer wizard (`https://proksi.local:5000`).
 - [ ] Caddy + Authentik wired into first-boot bootstrap
-- [ ] Managed gateway infrastructure — `ns1/ns2.furtka.org` + DNS-01 wildcard automation
+- [ ] Managed gateway DNS — `ns1/ns2.furtka.org` + DNS-01 wildcard automation (the gateway itself works today with your own domain and per-app or wildcard A records)
 - [ ] First containerized service (Nextcloud?) with auto-SSO + auto-subdomain
 - [ ] Competitor hands-on testing on Proxmox — validate findings from docs/competitors.md
 - [ ] UI mockups / drafts (Robert)