Add section about deploying with now to the docs (#3641)
Add section about deploying with now to the docs (#3641)

* Add section to the deploy docs page for deploying to now

* Add section to the deploy docs page for deploying to now

* Add install code snippet

* Update deploy-gatsby.md

danielfarrell/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,fabrictech/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,fabrictech/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,mingaldrichgan/gatsby,fk/gatsby,0x80/gatsby,0x80/gatsby,0x80/gatsby,fabrictech/gatsby,danielfarrell/gatsby,danielfarrell/gatsby,fk/gatsby,ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,fk/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby