updated hapiserver.js to v17.3.1 syntax

hapiserver.js

@@ -3,18 +3,19 @@
 const Hapi = require('hapi');
 
 // Create a server with a host and port
-const server = new Hapi.Server();
-server.connection({ 
-    host: 'localhost', 
-    port: 8000 
+const server = new Hapi.Server({
+    host: 'localhost',
+    port: 8000
 });
 
 // Add the route
 server.route({
     method: 'GET',
-    path:'/', 
-    handler: function (request, reply) {
-        return reply('Hello World!').header('Connection', 'close');
+    path:'/',
+    handler: function (request, h) {
+        const response = h.response('Hello World!');
+        response.header('Connection','close');
+        return response;
     }
 });
 
@@ -25,4 +26,4 @@ server.start((err) => {
         throw err;
     }
     console.log('Server running at:', server.info.uri);
-});
+});