app.js

const createError = require('http-errors');
const express = require('express');
const path = require('path');
const session = require('cookie-session');
const logger = require('morgan');
const http = require('http');
const {Datastore} = require('@google-cloud/datastore');

var app = express();
var server = http.Server(app);

const io = require("socket.io")(server);

var indexRouter = require('./routes/index');
var aboutRouter = require('./routes/about');
var usersRouter = require('./routes/users');
var classifierRouter = require('./routes/classifier')(io);
var logRouter = require('./routes/log');


// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
app.set('port', 8080);

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

// Other App Features
app.use(session({
    name: 'session_real',
    keys: ['aa;lskdmt;qlwkmetr;lqwkmner', 'b109283nf-0129j3g', 'c102398tn1-293int']
}))

app.use(express.static(path.join(__dirname, 'public')));
app.use('/scripts', express.static(path.join(__dirname, 'views/scripts')));

app.locals.datastore = new Datastore({
  projectId: 'mycovidtracker',
});

app.use('/', indexRouter);
app.use('/about', aboutRouter);
app.use('/users', usersRouter);
app.use('/classifier', classifierRouter);
app.use('/log', logRouter);

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

app.use(function(err, req, res, next) {
    res.locals.message = err.message;
    res.locals.error = req.app.get('env') === 'development' ? err : {};
    res.status(err.status || 500);
    res.render('error');
});

server.listen(8080, function() {
    console.log('Starting server on port 8080');
});