feat(intial auth): intial auth setup for the scanner

backend/mobile/version.route.ts

@@ -0,0 +1,28 @@
+import fs from "node:fs";
+import { Router } from "express";
+
+import path from "path";
+
+const router = Router();
+
+const projectRoot = path.resolve("./lstMobile"); // adjust as needed
+const appJsonPath = path.join(projectRoot, "app.json");
+
+router.get("/", async (req, res) => {
+	const baseUrl = `${req.protocol}://${req.get("host")}`;
+
+	const raw = fs.readFileSync(appJsonPath, "utf-8");
+	const config = JSON.parse(raw);
+
+	const exp = config.expo;
+
+	res.json({
+		packageName: exp.android?.package,
+		versionName: exp.version,
+		versionCode: exp.android?.versionCode,
+		minSupportedVersionCode: exp?.android?.minSupportedVersionCode ?? 0,
+		downloadUrl: `${baseUrl}/lst/api/mobile/apk/latest`,
+	});
+});
+
+export default router;