web: newsletter signup on download page

web/app/api/signup/route.ts

@@ -0,0 +1,17 @@
+import { Analytics } from '@segment/analytics-node'
+import { v4 as uuid } from 'uuid'
+
+const analytics = new Analytics({ writeKey: process.env.TELEMETRY_WRITE_KEY || '<empty>' })
+
+export async function POST(req: Request) {
+  const { email } = await req.json()
+
+  analytics.identify({
+    anonymousId: uuid(),
+    traits: {
+      email,
+    },
+  })
+
+  return new Response(null, { status: 200 })
+}