workadventure: Add creation of user and group

roles/workadventure/tasks/main.yml

@@ -9,6 +9,17 @@
 - name: Install git
   apt: name=git
 
+- name: Create workadventure group
+  group: name=workadventure
+
+- name: Create workadventure user
+  user: 
+    name: workadventure
+    home: /opt/workadventure
+    shell: /bin/zsh
+    group: workadventure
+    groups: docker
+
 - name: Install systemd unit
   template: src=workadventure.service.j2 dest=/lib/systemd/system/workadventure.service
   notify: