feat: lambda-apiを最低限で導入

handler.js

@@ -1,7 +1,9 @@
+const api = require("lambda-api")();
+
+api.get("/status", async (req, res) => {
+  return { status: "ok" };
+});
+
 exports.router = async (event, context, callback) => {
-  return {
-    statusCode: 200,
-    headers: {},
-    body: JSON.stringify({ message: "hello world" }),
-  };
+  return await api.run(event, context);
 };