diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 4556e54..e30f716 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -3,12 +3,13 @@
 #   docker compose -f docker/docker-compose.yml up --build
 services:
   app:
+    # no image: field => compose auto-names (docker-app), never pulls,
+    # always builds local. Service image private, never published.
     build:
       context: ..
       dockerfile: docker/Dockerfile
       args:
         - REACT_APP_TRACKER_APP_ID=${TRACKER_APP_ID:-ttrpg-initiative-tracker-default}
-    image: ttrpg-app:local
     ports:
       - "${PORT:-8080}:80"
     volumes: