Terraform 0.12 (#20)

* Terraform 0.12

demo-12/securitygroup.tf

@@ -1,43 +1,43 @@
 resource "aws_security_group" "example-instance" {
-  vpc_id = "${aws_vpc.main.id}"
-  name = "allow-ssh"
+  vpc_id      = aws_vpc.main.id
+  name        = "allow-ssh"
   description = "security group that allows ssh and all egress traffic"
   egress {
-      from_port = 0
-      to_port = 0
-      protocol = "-1"
-      cidr_blocks = ["0.0.0.0/0"]
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
   }
 
   ingress {
-      from_port = 22
-      to_port = 22
-      protocol = "tcp"
-      cidr_blocks = ["0.0.0.0/0"]
-  } 
-tags {
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+  tags = {
     Name = "example-instance"
   }
 }
 
 resource "aws_security_group" "allow-mariadb" {
-  vpc_id = "${aws_vpc.main.id}"
-  name = "allow-mariadb"
+  vpc_id      = aws_vpc.main.id
+  name        = "allow-mariadb"
   description = "allow-mariadb"
   ingress {
-      from_port = 3306
-      to_port = 3306
-      protocol = "tcp"
-      security_groups = ["${aws_security_group.example-instance.id}"]              # allowing access from our example instance
+    from_port       = 3306
+    to_port         = 3306
+    protocol        = "tcp"
+    security_groups = [aws_security_group.example-instance.id] # allowing access from our example instance
   }
   egress {
-      from_port = 0
-      to_port = 0
-      protocol = "-1"
-      cidr_blocks = ["0.0.0.0/0"]
-      self = true
+    from_port   = 0
+    to_port     = 0
+    protocol    = "-1"
+    cidr_blocks = ["0.0.0.0/0"]
+    self        = true
   }
-  tags {
+  tags = {
     Name = "allow-mariadb"
   }
 }