write test script for cypress

to properly kill the process

packages/docs/scripts/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}

packages/docs/scripts/test.ts

@@ -0,0 +1,9 @@
+import cypress from "cypress"
+import { execa } from "execa"
+import waitOn from "wait-on"
+
+await execa("pnpm", ["build"], { stdio: "inherit" })
+const app = execa("pnpm", ["start"], { stdio: "inherit" })
+await waitOn({ resources: ["http-get://localhost:3000"] })
+await cypress.run()
+app.kill()