removed yarn install now that sendgrid-node is sorted out

readme.md

@@ -36,17 +36,15 @@ This is a simple SPA built using [Koa](http://koajs.com/) (2.3) as the backend a
 
 ``` bash
 # install dependencies
-yarn install
+npm install
 
 # serve using nodemon with hot reload
 npm run watch
 
 # build for production with prettier
 npm run build
 
-# serve in production using the pm2 ecosystem.json file Note: Currently
-# using yarn for the install due to the SendGrid node package requiring this
-# at the moment.
+# serve in production using the pm2 ecosystem.json file
 npm run start-production
 ```
 
@@ -119,4 +117,4 @@ Go ahead and fork the project! Message me here if you have questions or submit a
 
 Copywrite 2017 John Datserakis
 
-[MIT](http://opensource.org/licenses/MIT)
+[MIT](http://opensource.org/licenses/MIT)