Relay 0.6.0: alles in een image, de app-map is leeg

Plan Eigenimage, fase 5, op keuze van de gebruiker: een image met de relay
erbij en geen tweede recept. agent.py, nginx.conf en index.html verhuizen
naar tools/evolu-relay/ naast src/; de Dockerfile blijft op node:24-slim en
haalt nginx en python3 uit apt. Drie containers uit een image: de relay als
node via de compose, de agent en nginx als root.

Anders dan alleen verplaatst: user www-data in nginx.conf (Debian heeft geen
gebruiker nginx), geen USER meer in de image, de versie in de kop via
api/status met RELAY_APP_VERSION. VERSION 0.6.0, manifest 0.6.0, drie keer
dezelfde tag in de compose, ongepind tot de eerste push.

Tests mee verhuisd; de vormtest toetst de drie tags tegen VERSION. Niet
gebouwd: er is hier geen Docker.

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

whatsnext-evolu-relay/umbrel-app.yml

@@ -11,7 +11,7 @@ manifestVersion: 1
 id: whatsnext-evolu-relay
 category: files
 name: Evolu Relay
-version: "0.5.6"
+version: "0.6.0"
 tagline: Encrypted sync and backup for your local-first apps
 description: >-
   Local-first apps keep your data on your own device and work whether or not you have a
@@ -43,6 +43,15 @@ description: >-
   your app at the address shown there. Away from home you will need a way in, such as Tailscale
   or a reverse proxy with your own domain.
 releaseNotes: >-
+  The whole app now ships as one image: the relay, the status page and the small helper behind it. Until
+  now only the relay did, and the other two were mounted into stock images from the app folder. Nothing
+  changes in what the app does; the app data folder now holds only your data, and the icon updates along
+  with everything else.
+
+
+  Everything in 0.5.6:
+
+
   Owners are now listed most recently seen first, in both panels. Until now the rows kept the order in
   which owners first showed up, which stops meaning anything after a week. The order follows along on its
   own: the page refreshes its lists every few seconds, so a reconnecting owner moves to the top without a