added GH compatibility badge

Author: psychobunny

Diff for: README.md

@@ -1,3 +1,5 @@
+![](https://packages.nodebb.org/api/v1/plugins/nodebb-plugin-custom-pages/compatibility.png)
+
 # Custom Pages for NodeBB
 
 Allows you to add as many new pages as you like to your NodeBB forum. Each new page has four widget areas (header, footer, content, and sidebar) which you can use to add HTML to in the Widgets ACP.
@@ -12,4 +14,4 @@ Allows you to add as many new pages as you like to your NodeBB forum. Each new p
 
 ## Manual Installation
 
-    npm install nodebb-plugin-custom-pages
+    npm install nodebb-plugin-custom-pages