Fix docs

docs/applications/joomla.md

@@ -1,13 +1,23 @@
 # Joomla CMS
 
-Bitwarden: [https://bitwarden.com/](https://bitwarden.com/)
+Homepage: [https://www.joomla.org/](https://www.joomla.org/)
 
-This is a Joomla package
+Joomla! is an award-winning content management system (CMS), which enables you to build web sites and powerful online applications.
 
 ## Usage
 
 Set `joomla_enabled: true` in your `group_vars/all.yml` file.
 
+If you want to access Joomla externally, set `joomla_available_externally: "true"` in your `group_vars/all.yml` file.
+
+The Joomla web interface can be found at http://ansible_nas_host_or_ip:8181.
+
 ## Specific Configuration
 
-Make sure you you change te MySQL passwords!
+  - Set `joomla_database_password` in your `all.yml` before installing Joomla.
+
+  - On first run you'll need to enter database details:
+    - Host: `mysql`
+    - Database: `joomla`
+    - Username: `root`
+    - Password: whatever you set for `joomla_database_password`.