chore(doc): switch zeit now to Vercel Now for Gatsby deployment

docs/docs/deploying-to-now.md

@@ -0,0 +1,31 @@
+---
+title: Deploying to Vercel Now
+---
+
+[Vercel Now](https://vercel.com/now) is a cloud platform for websites and serverless APIs, that you can use to deploy your Gatsby projects to your personal domain (or a free `.now.sh` suffixed URL).
+
+This guide will show you how to get started in a few quick steps:
+
+## Step 1: Getting Started with Gatsby
+
+To install the Vercel command-line interface with [npm](https://www.npmjs.com/), run the following command:
+
+```shell
+npm install -g now
+```
+
+## Step 2: Deploying
+
+You can deploy your application by running the following command in the root of the project directory:
+
+```shell
+now
+```
+
+That's all!
+
+Your site will now deploy, and you will receive a link similar to the following: https://gatsby-functions.now-examples.now.sh
+
+## References:
+
+- [Example Project](https://github.com/zeit/now/tree/master/examples/gatsby)