Initial commit of dashboard

Static status dashboard served via nginx, with the switch TLS proxy
section relabeled from WWTP to Extreme.

README.md

@@ -0,0 +1,22 @@
+# dashboard — links page for services on this box
+
+Static launcher page linking out to every service's own web UI (NetBox,
+NocoDB, camera-list, go2rtc, LLDP mapper, switch-config-manager, RV50x
+manager, and the stunnel-proxied WWTP switches). No health polling, no
+live status — just direct links, same as typing the URL by hand.
+
+## Setup
+
+```
+docker compose up -d --build
+```
+
+Open `http://<vm-ip>:8090/`.
+
+## Updating
+
+`index.html` is a single static file — edit it directly (add/remove a
+card, fix a port) and run `docker compose up -d --build` to pick up the
+change. There's no generator script; unlike camera-list or lldp-mapper
+this doesn't pull from NocoDB, since it's just a fixed list of the
+services running on this host.