move initial comments to json file

Author: zpao

_comments.json

@@ -0,0 +1,6 @@
+[
+  {
+    "author": "Pete Hunt",
+    "text": "Hey there!"
+  }
+]

server.js

@@ -1,8 +1,9 @@
+var fs = require('fs');
 var express = require('express');
 var bodyParser = require('body-parser');
 var app = express();
 
-var comments = [{author: 'Pete Hunt', text: 'Hey there!'}];
+var comments = JSON.parse(fs.readFileSync('_comments.json'))
 
 app.use('/', express.static(__dirname));
 app.use(bodyParser.json());