Playbook will also install software-properties-common. Removed hardcoded host name.

Ansible/lxc_setup_ubuntu.yml

@@ -1,6 +1,6 @@
 ---
 - name: Secure and Configure a New LXC Container
-  hosts: ansible # Hosts or group defined in your inventory
+  hosts: '{{ hosts_to_work_on }}' # Hosts or group defined in your inventory
   become: yes # Run all tasks as root (sudo)
   tasks:
     - name: 1. Create user '{{ target_user }}'
@@ -31,6 +31,12 @@
         name: '{{ target_user }}'
         password_lock: yes
 
+    - name: 4.0. Install software-properties-common
+      ansible.builtin.apt:
+        name: software-properties-common
+        state: present
+        update_cache: yes
+
     - name: 4.1. Disallow root login over SSH
       ansible.builtin.lineinfile:
         path: /etc/ssh/sshd_config
@@ -54,4 +60,4 @@
       listen: "restart sshd"
       ansible.builtin.service:
         name: sshd
-        state: restarted
+        state: restarted