Added telemetry script.

scripts/telemetry.js

@@ -0,0 +1,59 @@
+require('dotenv').config();
+const fs = require('fs-extra');
+const path = require('path');
+const os = require('os');
+const retry = require('async-retry');
+const isCI = require('is-ci');
+const pkg = require('../package.json');
+
+const dest = path.resolve(__dirname, '../.next/cache/umami.json');
+const url = 'https://telemetry.umami.is/api/collect';
+
+async function run() {
+  await fs.ensureFile(dest);
+
+  let json = {};
+
+  try {
+    json = await fs.readJSON(dest);
+  } catch {
+    // Ignore
+  }
+
+  if (json.version !== pkg.version) {
+    const { default: isDocker } = await import('is-docker');
+    const { default: fetch } = await import('node-fetch');
+
+    await fs.writeJSON(dest, { version: pkg.version });
+
+    const payload = {
+      umami: pkg.version,
+      node: process.version,
+      platform: os.platform(),
+      arch: os.arch(),
+      os: os.version(),
+      isDocker: isDocker(),
+      isCI,
+    };
+
+    await retry(
+      async () => {
+        const res = await fetch(url, {
+          method: 'post',
+          cache: 'no-cache',
+          headers: {
+            'Content-Type': 'application/json',
+          },
+          body: JSON.stringify(payload),
+        });
+
+        console.log(res);
+      },
+      { minTimeout: 500, retries: 1, factor: 1 },
+    ).catch(() => {});
+  }
+}
+
+if (!process.env.TELEMETRY_DISABLED) {
+  run();
+}