added notes about AWS keys in nodejs setup
added notes about AWS keys in nodejs setup

hashicorp/atlas-examples,pingvishal/atlas-examples,Test-Betta-Inc/atlas-examples,Test-Betta-Inc/atlas-examples,Test-Betta-Inc/atlas-examples,hashicorp/atlas-examples,hashicorp/atlas-examples,pingvishal/atlas-examples,Test-Betta-Inc/atlas-examples,pingvishal/atlas-examples