added variable keypair-name and public-key

vars.tf

@@ -10,3 +10,9 @@ variable "public-network-name" {
   default = "bright-external-flat-externalnet"
 }
 
+variable "keypair-name" {
+  default = "os-gen-keypair"
+}
+
+variable "public-key" {
+  default = "${file("~/.ssh/id_rsa.pub")}"
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