app.js

import express from 'express'
import pug from 'pug'
import favicon from 'serve-favicon'
import sassMiddleware from 'node-sass-middleware'
import routes from './src/app/routes'

const env = 'production',
  port = process.env.PORT || 3000,
  publicDir = `${__dirname}/public`,
  viewDir = `${__dirname}/src/views`,
  faviconDir = `${__dirname}/public/img/favicon.png`,
  app = express()

app
  .set( 'views', viewDir )
  .set( 'view engine', 'pug' )
  .set( 'port', port )
  .set( 'env', env )

  .use(sassMiddleware({
    src: `${__dirname}/src/scss`,
    dest: publicDir,
    debug: false,
    outputStyle: 'compressed'
  }))
  .use( express.static(publicDir) )
  .use( favicon(faviconDir) )
  .use( routes )

if ( app.get('env')  === 'production' ) {
  app.use((req, res, next) => {
    let err = new Error('Not Found')
    err.status = 404
    next(err)
  })

  app.use((err, req, res, next) => {
    res.status(err.status || 500)
    res.render('error', { err: err })
  })
}

export default app