diff --git a/web/apps/auth/.env b/web/apps/auth/.env
index 3f3b1cc9a..49fd5c743 100644
--- a/web/apps/auth/.env
+++ b/web/apps/auth/.env
@@ -1 +1,4 @@
 NEXT_TELEMETRY_DISABLED = 1
+
+# For details on how to populate a .env.local to run auth and get it to connect
+# to an arbitrary Ente instance, see `apps/photos/.env`.