Added postbuild script.

scripts/postbuild.js

@@ -0,0 +1,10 @@
+require('dotenv').config();
+const sendTelemetry = require('./telemetry');
+
+async function run() {
+  if (!process.env.TELEMETRY_DISABLE) {
+    await sendTelemetry();
+  }
+}
+
+run();