Make sure user is in sudo group

ansible/main.yml

@@ -315,6 +315,21 @@
         dest: /etc/chkrootkit.conf
         mode: 0644
 
+    # -------------------------------------------------------------------------
+    # Install sudo and user to group.
+    # -------------------------------------------------------------------------
+
+    - name: Install sudo
+      apt:
+        name: sudo
+
+    - name: Adding existing user to group sudo
+      user:
+        name: "{{ ansible_ssh_user }}"
+        groups: sudo
+        append: yes
+
+
     # -------------------------------------------------------------------------
     # Docker CE.
     # -------------------------------------------------------------------------