dummy-module: add outputs like public_ips or hostnames

Signed-off-by: Jakub Sokołowski <jakub@status.im>

modules/dummy-module/outputs.tf

@@ -0,0 +1,11 @@
+output "public_ips" {
+  value = var.ips
+}
+
+output "hostnames" {
+  value = values(local.hostnames)
+}
+
+output "hosts" {
+  value = zipmap(values(local.hostnames), var.ips)
+}