Redmine

Hi all.

I want to install the 'code snippet' plugin in CKEditor.

I already installed CKEditor and downloaded code snippet plugin.
CKEditor plugin : https://github.com/a-ono/redmine_ckeditor
CKEditor code snippet plugin : https://github.com/ckeditor/ckeditor-dev/tree/major/plugins/codesnippet

But I don't know, how to install code snippet plugin?

I've been wandering around for days...

Please help me!