Create CONTRIBUTING_ES.md (#4135)
Create CONTRIBUTING_ES.md (#4135)

Done. any other suggestion? I'll change it as many times as necessary :). Cheers!
mingaldrichgan/gatsby,mingaldrichgan/gatsby,fk/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,ChristopherBiscardi/gatsby,fk/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,0x80/gatsby,fk/gatsby