diff --git a/docker-compose.yml b/docker-compose.yml
index 551866c..e8ab313 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -4,16 +4,19 @@
 # A variable set in Portainer's UI but absent from this file silently does
 # nothing — the trap that bit PLAYERMAP_SHOW_GMS on the Mythica stack.
 #
-# The image is built off-box and pushed/loaded onto Nox (§11.2). Pin a real
-# version tag; never deploy bare :latest.
+# Deployed as a Portainer *git* stack: Portainer clones this repo onto Nox and
+# `docker compose up` builds the image there, so no registry is needed. The
+# image: tag still pins a real version so a redeploy replaces it predictably
+# rather than reusing a stale :latest.
 
 services:
   mediashelf:
     image: ${MEDIASHELF_IMAGE:-mediashelf:0.1.0}
+    build: .
     container_name: mediashelf
     restart: unless-stopped
     ports:
-      - "${MEDIASHELF_PORT:-8085}:8080"
+      - "${MEDIASHELF_PORT:-8086}:8080"
     volumes:
       - mediashelf_data:/data
     environment: