feat(deploy): make compose standalone with optional Laya (#30)

Use configurable published images in docker-compose and update deployment docs so Compose works without a full checkout or local Dockerfiles.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

docker-compose.yml

@@ -1,9 +1,6 @@
 services:
   nodecast-tv:
-    build:
-      context: .
-      dockerfile: Dockerfile
-    image: gitea.anthonybouteiller.ovh/blomios/nodecast-tv:latest
+    image: ${NODECAST_IMAGE:-gitea.anthonybouteiller.ovh/blomios/nodecast-tv:latest}
     container_name: nodecast-tv
     ports:
       - "3000:3000"
@@ -20,9 +17,7 @@ services:
 
   laya:
     profiles: ["laya"]
-    build:
-      context: .
-      dockerfile: Dockerfile.laya
+    image: ${LAYA_IMAGE:-gitea.anthonybouteiller.ovh/blomios/nodecast-tv-laya:latest}
     volumes:
       - ./data/models/laya:/models
     environment: