message: Check number of deployed apps in E2E
diff: @@ -226,6 +226,9 @@ class App {
  waitOnChild(child),
  ]);
  const apps = JSON.parse(out);
  + if (apps.length !== 1) {
  + throw new Error(`Expected exactly 1 app to be deployed, got: ${apps.length}`);
  + }
  await fn(apps[0].URL);
  } finally {
  await spawn('node', [cli, 'destroy'], {
  