added hostname playbook

hostname.yml

@@ -0,0 +1,10 @@
+---
+- hosts: all
+  become: true
+  tasks:
+    - name: Import related variables
+      ansible.builtin.include_vars:
+        file: hostname.yml
+    - import_tasks: tasks/debian-general/hostname.yml
+    - import_tasks: tasks/debian-general/resolv-conf.yml
+    - import_tasks: tasks/debian-general/hosts-file.yml