app.js

import express, { json, urlencoded } from "express";
import morgan from "morgan";

import indexRouter from "./routes/index.js";

const app = express();
app.set("port", process.env.PORT || 3000);

app.use(morgan("dev"));
app.use(json());
app.use(urlencoded({ extended: false }));

app.use("/", indexRouter);

app.use((req, res, next) => {
  const error = new Error(`${req.method} ${req.url} 라우터가 없습니다.`);
  error.status = 404;
  next(error);
});

app.use((err, req, res, next) => {
  res.locals.message = err.message;
  res.locals.error = process.env.NODE_ENV !== "production" ? err : {};
  res.status(err.status || 500);
  console.error(err);
  res.send("Internal Server Error");
});

app.listen(app.get("port"), () => {
  console.log(app.get("port"), "번 포트에서 대기중");
});