Use startServer function

server.js

@@ -4,32 +4,34 @@ const createApp = require('./server/createApp')
 
 const port = parseInt(process.env.PORT, 10) || 5000
 
+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,
   lifetime: Infinity,
   grace: 25000,
-  start: function (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-Type: text/plain`,
-        `Content-Length: ${Buffer.byteLength(message)}`,
-        `Connection: close`,
-        ``,
-        message
-      ].join(`\r\n`))
-    })
-
-    server.listen(port, function () {
-      console.log('Server #%s listening on port %s, Ctrl+C to stop', id, port)
-    })
-  }
+  start: startServer
 })