Add ability to add trusted hosts

README.md

@@ -15,4 +15,9 @@ drupal_settings:
                 database: mydatabase
                 username: user
                 password: secret
+          trusted_hosts: # Optional
+            - '^example\.com$'
+            - '^.+\.example\.com$'
+            - '^example\.org$'
+            - '^.+\.example\.org$'
 ```

templates/settings.php.j2

@@ -19,6 +19,14 @@ $databases['{{ key }}']['{{ target }}'] = [
 $base_url = '{{ item.1.settings.base_url }}';
 {% endif %}
 
+{% if item.1.settings.trusted_hosts is defined %}
+$settings['trusted_host_patterns'] = array(
+{% for host in item.1.settings.trusted_hosts %}
+  '{{ host }}',
+{% endfor %}
+);
+{% endif %}
+
 {% if item.1.settings.extra_parameters is defined %}
   {{ item.1.settings.extra_parameters|indent(0) }}
 {% endif %}