Instance count as output (#121)

* Output for getting the amount of instances to be created that are passed as argument

* Updated documentation

README.md

@@ -154,6 +154,7 @@ data "aws_ami" "ubuntu-xenial" {
 | tags | List of tags of instances |
 | volume\_tags | List of tags of volumes of instances |
 | vpc\_security\_group\_ids | List of associated security groups of instances, if running in non-default VPC |
+| instance\_count | Number of instances to launch specified as argument to this module |
 
 <!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
 

outputs.tf

@@ -102,3 +102,8 @@ output "volume_tags" {
   description = "List of tags of volumes of instances"
   value       = aws_instance.this.*.volume_tags
 }
+
+output "instance_count" {
+  description = "Number of instances to launch specified as argument to this module"
+  value       = var.instance_count
+}