diff --git a/.env.prod b/.env.prod
index 9a336a2..e9c6b99 100644
--- a/.env.prod
+++ b/.env.prod
@@ -1,3 +1,9 @@
+# vue-router mode: hash | history | memory
+VITE_ROUTER_HISTORY_MODE=hash
+
+# frontend service base url, prod environment
+VITE_BASE_URL=/u
+
 # backend service base url, prod environment
 VITE_SERVICE_BASE_URL=/u-api