app.js

const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const cors = require('cors');
const dotenv = require('dotenv');
dotenv.config();

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

const app = express();

app.set('etag', false);
const options = { etag: false };
app.use(cors());
app.use(express.static('public', options));
app.use(logger(process.env.use_env_variable));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);

// 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 : {};

    // render the error page
    res.status(err.status || 500);
    res.json({
        message: err.message,
        error: err,
    });
});

module.exports = app;