Slack doc

Author: MrSwitch

demos/slack.html

@@ -7,9 +7,9 @@
 <title>hello( slack )</title>
 <h1>hello( slack )</h1>
 
-
 <blockquote>
-	Checkout the <a href="https://api.slack.com/">Slack API</a>
+	<p>Checkout the <a href="https://api.slack.com/">Slack API</a>.</p>
+	<p>The API uses the explicit OAuth2 grant flow, therefore requires an <a href="../#oauth-proxy">oauth_proxy</a>.</p>
 </blockquote>
 
 <button onclick="login();" id="profile">Login Slack</button>