add riot web registration possibility

roles/matrix-nginx-proxy/templates/nginx/conf.d/matrix-riot-web.conf.j2

@@ -7,6 +7,10 @@
 		{{- configuration_block }}
 	{% endfor %}
 
+	# location  ~ ^/(static|register) {
+    #             proxy_pass http://matrix-registration:5000;
+    #     }
+
 	location / {
 		{% if matrix_nginx_proxy_enabled %}
 			{# Use the embedded DNS resolver in Docker containers to discover the service #}