feat: add EpicGames get FreeGames (#3196)

lib/router.js

@@ -1,6 +1,23 @@
 const Router = require('koa-router');
 const router = new Router();
 
+// 遍历整个 routes 文件夹，导入模块路由 router.js 和 router-custom.js 文件
+// 格式参考用例：routes/epicgames/router.js
+const RouterPath = require('require-all')({
+    dirname: __dirname + '/routes',
+    filter: /^.*router([-_]custom[s]?)?\.js$/,
+});
+
+// 将收集到的自定义模块路由进行合并
+for (const project in RouterPath) {
+    for (const routerName in RouterPath[project]) {
+        const proRouter = RouterPath[project][routerName]();
+        proRouter.stack.forEach((nestedLayer) => {
+            router.stack.push(nestedLayer);
+        });
+    }
+}
+
 // index
 router.get('/', require('./routes/index'));