fix: recover empty database migrations and persist Docker icons

.env.production.example

@@ -7,6 +7,8 @@ ADMIN_PASSWORD=REPLACE_WITH_A_STRONG_INITIAL_PASSWORD
 
 API_HOST=0.0.0.0
 PORT=3100
+# Container path; Compose binds /opt/worthpath/data/icons on the host here.
+ICON_STORAGE_DIR=/app/data/icons
 API_ALLOWED_HOSTS=worthpath.example.com
 WEB_ORIGIN=https://worthpath.example.com