Allow extra response headers

templates/vhost.conf

@@ -30,6 +30,9 @@
 
   Header always add Strict-Transport-Security "max-age=15768000; includeSubDomains; preload"
   Header set Referrer-Policy "no-referrer"
+{% for header in nextcloud.headers|default([]) %}
+  Header set {{ header }}
+{% endfor %}
 
 {% if nextcloud.protocol|default("https") == "https" and groups.proxyserver is defined %}
   SetEnv HTTP_X_FORWARDED_HOST {{ nextcloud.domain }}