Add service worker to server.js

server.js

@@ -1,6 +1,7 @@
 const express = require('express')
 const next = require('next')
 const compression = require('compression')
+const path = require('path')
 
 const port = process.env.PORT || 3000
 const dev = process.env.NODE_ENV !== 'production'
@@ -14,6 +15,11 @@ app.prepare().then(() => {
     server.use(compression())
   }
 
+  server.get(
+    '/service-worker.js',
+    express.static(path.join(process.cwd(), '.next'))
+  )
+
   server.get('/awtis', (request, response) => {
     response.redirect('/awtis/paj/1')
   })