app.js

const createError = require("http-errors");
const express = require("express");
const path = require("path");
const cookieParser = require("cookie-parser");
const logger = require("morgan");
const cors = require("cors");

const indexRouter = require("./routes/index");

const app = express();

// Use cors middleware before any other middleware
app.use(
    cors({
        origins: ["http://localhost:3000"],
        methods: ["GET", "POST", "PUT", "DELETE"],
    })
);

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({extended: false}));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));

app.use("/", indexRouter);

// catch 404 and forward to error handler
app.use(function (req, res, next) {
    next(createError(404));
});

// error handler
// error handler
app.use(function (err, req, res, next) {
    // set locals, only providing error in development
    res.locals.message = err.message;
    res.locals.error = req.app.get("env") === "development" ? err : {};

    // send error message as a simple text response
    res.status(err.status || 500);
    res.send(err.message);
    next();
});

module.exports = app;