added baseurl_selfservice config

close #22

public/env.sample.js

@@ -3,6 +3,8 @@ const config = {
 	documentserver_key: '',
 	// required
 	baseurl: '',
+	// optional, will fallback to /selfservice
+	baseurl_selfservice: '/selfservice',
 	// optional, will fallback to /imprint
 	url_imprint: '',
 	// optional, will fallback to /privacy