server.js

"use strict";
const express = require("express");
const path = require("path");
const serverless = require("serverless-http");
const app = express();
const bodyParser = require("body-parser");
const morgan = require("morgan");

const router = express.Router();
router.get("/", (req, res) => {
  res.writeHead(200, { "Content-Type": "text/html" });
  res.write("<h1>Hello from Express.js!</h1>");
  res.end();
});
router.get("/another", (req, res) => res.json({ route: req.originalUrl }));
router.post("/", (req, res) => res.json({ postBody: req.body }));
router.get("/api/400", (req, res) => {
  console.log("params", { query: req.query });
  if (req.query.bypass === "true") {
    res.json({ message: "success", error: null, code: 200 });
    return;
  } else {
    res.writeHead(400, { "Content-Type": "application/json" });
    res.end(
      JSON.stringify({
        error: "Something went wrong (not, it's a joke)",
        code: 400,
      })
    );
    return;
  }
});

app.use(morgan("combined"));
app.use(bodyParser.json());
app.use("/.netlify/functions/server", router); // path must route to lambda
app.use("/", (req, res) => res.sendFile(path.join(__dirname, "../index.html")));

module.exports = app;
module.exports.handler = serverless(app);