Atreides Services: app-map in de store

Naar het voorbeeld van whatsnext-atreides-assets: compose, manifest,
icoon en data/app/.gitkeep. De beheer-app (8090) hangt achter app_proxy,
zonder ports: en zonder wachtwoord in de compose;
ATREIDES_SERVICES_HOST staat op 0.0.0.0. Poort 3854 in het manifest.

De image is nog niet gepind: er is nog geen release. Na de eerste zet
tools/release-bump.mjs tag en digest erin. Het icoon is de stier van
Atreides Assets op blauw getint glas, zodat de twee te onderscheiden zijn.

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

README.md

@@ -8,6 +8,7 @@ A community app store for [Umbrel](https://umbrel.com), store id `whatsnext`. Ad
 | **Electrum Gate** | Reach your own Electrum server from outside your network, over TLS. |
 | **Evolu Relay** | Run the sync relay behind Trezor Suite's labels on your own Umbrel, with an owner allowlist. |
 | **Atreides Assets** | A self-hosted overview of your crypto and precious metals. |
+| **Atreides Services** | Your own price feed for Atreides Assets, recorded around the clock. Early version. |
 
 The image recipes for the first two are in [tools/](tools/); the tests are in [tests/](tests/).