cleanup directory strucutre and fine tune

terraform/network.tf

@@ -0,0 +1,10 @@
+resource "aws_vpc" "test-env" {
+  cidr_block = "10.0.0.0/16"
+  enable_dns_hostnames = true
+  enable_dns_support = true
+}
+
+resource "aws_eip" "ip-test-env" {
+  instance = "${aws_instance.app_server.id}"
+  vpc      = true
+}