[www] Add gatsby-starter-simple-landing (#3877)
[www] Add gatsby-starter-simple-landing (#3877)


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