diff --git a/docker-compose.yml b/docker-compose.yml
index 78b650a..b8da8cd 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -53,6 +53,13 @@ services:
       - ./images:/images
       - ./import:/import
       - ./downloads:/downloads
+      # FC-5 legacy migration: bind-mount the host's ImageRepo images dir
+      # under /import (FC's existing filesystem scan picks them up). Read-only
+      # is sufficient — FC copies into /images during the scan. The worker +
+      # scheduler services see the same /import via their own mounts below
+      # because of /import volume reuse. Edit the host path to match your
+      # install before running Settings → Maintenance → Legacy migration.
+      # - /var/lib/imagerepo/images:/import/imagerepo:ro
     depends_on:
       postgres: { condition: service_healthy }
       redis:    { condition: service_healthy }