Obligatory warning

Author: remcoder

README.md

@@ -2,6 +2,9 @@
 
 Enriches the file list with a preview thumbnail for each gcode file.
 
+## Use at your own risk
+This plugin uses some hack to what is otherwise impossible via the official API. This means that upgrading Octoprint or using other plugins will lead to all sorts of issues.
+
 ## Setup
 
 Install via the bundled [Plugin Manager](https://github.com/foosel/OctoPrint/wiki/Plugin:-Plugin-Manager)