feat: add molecule role testing

molecule/default/verify.yml

@@ -0,0 +1,22 @@
+---
+
+# verify
+- name: "verify"
+  hosts: "all"
+  become: true
+  gather_facts: true
+  tasks:
+
+    # check if unbound is installed
+    - name: "check package"
+      ansible.builtin.package:
+        name: "unbound"
+        state: "present"
+      check_mode: true
+
+    # check if unbound is started
+    - name: "check service"
+      ansible.builtin.service:
+        name: "unbound"
+        state: "started"
+      check_mode: true