Add public Android APK download

backend/src/modules/downloads/downloads.controller.js

@@ -0,0 +1,14 @@
+const downloadsService = require('./downloads.service');
+
+const downloadAndroidApk = async (req, res, next) => {
+  try {
+    const { filePath, fileName } = await downloadsService.getAndroidApk();
+    return res.download(filePath, fileName);
+  } catch (error) {
+    return next(error);
+  }
+};
+
+module.exports = {
+  downloadAndroidApk,
+};

backend/src/modules/downloads/downloads.routes.js

@@ -0,0 +1,8 @@
+const express = require('express');
+const downloadsController = require('./downloads.controller');
+
+const router = express.Router();
+
+router.get('/android-apk', downloadsController.downloadAndroidApk);
+
+module.exports = router;

backend/src/modules/downloads/downloads.service.js

@@ -0,0 +1,24 @@
+const fs = require('fs/promises');
+const path = require('path');
+const env = require('../../config/env');
+
+const getAndroidApk = async () => {
+  const filePath = env.androidApkPath;
+
+  try {
+    await fs.access(filePath);
+  } catch {
+    const error = new Error('Android APK not found.');
+    error.statusCode = 404;
+    throw error;
+  }
+
+  return {
+    filePath,
+    fileName: path.basename(filePath),
+  };
+};
+
+module.exports = {
+  getAndroidApk,
+};