diff --git a/web/gui2-topo-lib/projects/gui2-topo-tester/src/environments/environment.prod.ts b/web/gui2-topo-lib/projects/gui2-topo-tester/src/environments/environment.prod.ts
new file mode 100644
index 0000000..3612073
--- /dev/null
+++ b/web/gui2-topo-lib/projects/gui2-topo-tester/src/environments/environment.prod.ts
@@ -0,0 +1,3 @@
+export const environment = {
+  production: true
+};