diff --git a/README.md b/README.md
index 678037f5d4327d271262db65035ff87b47894094..08ebd3b5b16fdde6333d621196fe11f6128b92c0 100644
--- a/README.md
+++ b/README.md
@@ -18,36 +18,39 @@ Example of Variables:
 # Debian 10 script only.
 ynh_install_script_url: https://install.yunohost.org
 
-ynh_admin_password: uo3A2iq4CtkUdt
+ynh_admin_password: MYINSECUREPWD_PLZ_OVERRIDE_THIS
 
 # The list of domains.
 ynh_main_domain: poclydra.eu
 ynh_extra_domains: 
   - forum.poclydra.eu
-  - wiki.poclydra.eu
+ynh_main_domain: domain.tld
+ynh_extra_domains: 
+  - forum.domain.tld
+  - wiki.domain.tld
 ynh_ignore_dyndns_server: False
 
 # The list of Yunohost users.
 ynh_users: 
    - name: user1
-     pass: q97CrbNHJFKuWz
+     pass: MYINSECUREPWD_PLZ_OVERRIDE_THIS
      firstname: Jane
      lastname: Doe 
-     mail_domain: poclydra.eu 
+     mail_domain: domain.tld 
 
 # The list of Yunohost apps.
 ynh_apps: 
   - label: WikiJS # Label is important, it's a reference for the Playbook.
     link: wikijs # It can be the name of an official app or a git repo link.
     args: # Provide args. Domain and pah are mandatory, for other args read manifest.json of app.
-      domain: wiki.poclydra.eu
+      domain: wiki.domain.tld
       path: /
       admin: user1 
       is_public: no
   - label: Discourse
     link: discourse 
     args:
-      domain: forum.poclydra.eu
+      domain: forum.domain.tld
       path: /
       admin: user1 
       is_public: yes
@@ -63,10 +66,13 @@ Example Playbook
 ```yml
 ---
 - name: Install Yunohost on Debian Server
-  hosts: dev
+  hosts: all
   become: True
-  tags:
-    - deploy
+  pre_tasks:
+    - name: Update all packages and index
+      ansible.builtin.apt:
+        upgrade: dist
+        update_cache: yes
     
   roles:
     - ansible-yunohost
diff --git a/default/main.yml b/default/main.yml
index 6b530b21b0302ca52f97129177668381e5b82bbd..59747b21e02f5528f2d768ff3fcfdbc8b8367d7e 100644
--- a/default/main.yml
+++ b/default/main.yml
@@ -10,7 +10,7 @@ ynh_extra_domains: ~
 ynh_ignore_dyndns_server: False
 
 # The list of Yunohost users.
-ynh_users: ~
+ynh_users: null
   # - name: user1
   #   pass: p@ssw0rd
   #   firstname: Jane
@@ -18,7 +18,7 @@ ynh_users: ~
   #   mail_domain: domain.tld
 
 # The list of Yunohost apps.
-ynh_apps: ~
+ynh_apps: null
   # - label: Tiny Tiny RSS # Label is important, it's a reference for the Playbook.
   #   link: ttrss # It can be the name of an official ynh app or a git repo link
   #   args: # Provide args here. Domain and path are mandatory, other args depend on the app (cf manifest.json of app).