Public web-only release: SvxPortal front-end + auth backend, install templates and INSTALL.md

Stripped from the internal repo: per-box deploy trees, Go services (nodelist/astmeta/proxy/svxdr),
deploy/sync scripts and all secrets. Config templates for nginx, PHP-FPM, Redis and tmpfiles
live in install/ with CHANGEME placeholders.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

README.md

@@ -0,0 +1,18 @@
+# SvxPortal web
+
+Web front-end for a [SvxReflector](https://github.com/sm0svx/svxlink): live node
+list and map, monitor, last-heard, talkgroup list, user accounts with e-mail
+verification, and admin pages for accounts, node certificates, node control and
+talkgroup requests.
+
+Static HTML/JS (Bootstrap from jsdelivr) plus a small PHP backend that keeps
+its data in Redis. No build step.
+
+- **Install:** see [INSTALL.md](INSTALL.md) — nginx, PHP-FPM, Redis, first admin.
+- **Config templates:** [`install/`](install/)
+- **User help:** `help.html` (served at `/help.html`)
+
+This repository contains the web application only. The live-data API it
+consumes (`/svxportal/api/...`) and the sudo helper scripts used by the
+reflector admin pages are site-specific and not included; INSTALL.md
+sections 9 and 10 describe what they must provide.