chore: include static assets in image and remove shadowing volumes

docker-compose.yml

@@ -12,8 +12,6 @@ services:
     environment:
       POSTGRES_URI: postgres://${PAYLOAD_DB_USER:-payload}:${PAYLOAD_DB_PASSWORD:-payload}@klz-db:5432/${PAYLOAD_DB_NAME:-payload}
       PAYLOAD_SECRET: ${PAYLOAD_SECRET:-fallback-secret-for-production-needs-change}
-    volumes:
-      - klz_media_data:/app/public/media
     labels:
       - "traefik.enable=true"
       # HTTP ⇒ HTTPS redirect