unpkg/server.js

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const http = require('http')
const throng = require('throng')
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const createApp = require('./server/createApp')
const port = parseInt(process.env.PORT, 10) || 5000
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function startServer(id) {
const server = http.createServer(createApp())
// Heroku dynos automatically timeout after 30s. Set our
// own timeout here to force sockets to close before that.
// https://devcenter.heroku.com/articles/request-timeout
server.setTimeout(25000, function (socket) {
const message = `Timeout of 25 seconds exceeded`
socket.end([
'HTTP/1.1 503 Service Unavailable',
'Date: ' + (new Date).toGMTString(),
'Content-Length: ' + Buffer.byteLength(message),
'Content-Type: text/plain',
'Connection: close',
'',
message
].join('\r\n'))
})
server.listen(port, function () {
console.log('Server #%s listening on port %s, Ctrl+C to stop', id, port)
})
}
throng({
workers: process.env.WEB_CONCURRENCY || 1,
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lifetime: Infinity,
grace: 25000,
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start: startServer
})