Terraform 0.12 (#20)

* Terraform 0.12

demo-9/instance.tf

@@ -1,29 +1,29 @@
 resource "aws_instance" "example" {
-  ami           = "${lookup(var.AMIS, var.AWS_REGION)}"
+  ami           = var.AMIS[var.AWS_REGION]
   instance_type = "t2.micro"
 
   # the VPC subnet
-  subnet_id = "${aws_subnet.main-public-1.id}"
+  subnet_id = aws_subnet.main-public-1.id
 
   # the security group
-  vpc_security_group_ids = ["${aws_security_group.allow-ssh.id}"]
+  vpc_security_group_ids = [aws_security_group.allow-ssh.id]
 
   # the public SSH key
-  key_name = "${aws_key_pair.mykeypair.key_name}"
+  key_name = aws_key_pair.mykeypair.key_name
 }
 
 resource "aws_ebs_volume" "ebs-volume-1" {
-    availability_zone = "eu-west-1a"
-    size = 20
-    type = "gp2" 
-    tags {
-        Name = "extra volume data"
-    }
+  availability_zone = "eu-west-1a"
+  size              = 20
+  type              = "gp2"
+  tags = {
+    Name = "extra volume data"
+  }
 }
 
 resource "aws_volume_attachment" "ebs-volume-1-attachment" {
   device_name = "/dev/xvdh"
-  volume_id = "${aws_ebs_volume.ebs-volume-1.id}"
-  instance_id = "${aws_instance.example.id}"
+  volume_id   = aws_ebs_volume.ebs-volume-1.id
+  instance_id = aws_instance.example.id
 }