Update mediaserver playbook and fix Wireguard task

mediaserver.yml

@@ -1,8 +1,9 @@
 - name: Install Media Server
-  hosts: mediaservers
+  hosts: "{{ PLAYBOOK_HOST | default('none') }}"
   become: true
   roles:
     - base
+    - jenkins
     - proxy
     - docker
     - traefik

roles/base/tasks/wireguard.yml

@@ -11,6 +11,7 @@
   args:
     chdir: /etc/wireguard/
     creates: /etc/wireguard/privatekey
+    executable: /usr/bin/bash
 
 - name: Grab WireGuard private key for configuration
   ansible.builtin.slurp: