📃 updated README

ref #3

public/env.sample.js

@@ -1,6 +1,10 @@
 const config = {
+	// required
 	documentserver_key: '',
+	// required
 	baseurl: '',
+	// optional, will fallback to /imprint
 	url_imprint: '',
+	// optional, will fallback to /privacy
 	url_privacy: ''
 };