Disable "." log in CI since it break's CircleCI's no_output_timeout

frontend/test/__runner__/backend.js

@@ -76,7 +76,10 @@ export const BackendResource = createSharedResource("BackendResource", {
           ")",
       );
       while (!await isReady(server.host)) {
-        process.stdout.write(".");
+        if (!process.env["CI"]) {
+          // disable for CI since it break's CircleCI's no_output_timeout
+          process.stdout.write(".");
+        }
         await delay(500);
       }
       process.stdout.write("\n");