Switch to using torrtle/simbarag:latest Docker image

Replace local build with pre-built image from Docker Hub

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

docker-compose.yml

@@ -2,7 +2,7 @@ version: '3.8'
 
 services:
   raggr:
-    build: .
+    image: torrtle/simbarag:latest
     ports:
       - "8080:8080"
     environment: