fix(repo): add missing lsof package needed to kill ports

.circleci/config.yml

@@ -90,7 +90,9 @@ commands:
             equal: [<< parameters.os >>, linux]
           steps:
             - run:
-                command: sudo apt-get install -y ca-certificates
+                command: |
+                  sudo apt-get update
+                  sudo apt-get install -y ca-certificates lsof
             - browser-tools/install-chrome
             - browser-tools/install-chromedriver
       - node/install:

e2e/next/src/utils.ts

@@ -46,7 +46,7 @@ export async function checkApp(
       `e2e ${appName}-e2e --no-watch --configuration=production --port=9000`
     );
     expect(e2eResults).toContain('All specs passed!');
-    await killPort(9000);
+    expect(await killPort(9000)).toBeTruthy();
   }
 
   if (opts.checkExport) {