app.js

require('dotenv').config();
let createError = require('http-errors');
let express = require('express');
let path = require('path');
let cookieParser = require('cookie-parser');
let logger = require('morgan');

let indexRouter = require('./routes/index');
let apisRouter = require('./routes/apis');
let app = express();

// if (process.env.userVercel !== true) {
//     let dbModel = require('./model/firebase_data');
//     (async ()=>{
//         await dbModel.onListenDataBase();
//     })();
// }

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');
app.set('etag', false);

app.enable('trust proxy');
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);
app.use('/apis/', apisRouter)

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

// 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.render('error');
});

module.exports = app;