A Unity WebGL template that can be imported to your own project and be used to create WebGL games that automatically resizes itself to fit within the bounds of the web portal embedding, including fullscreen resize support.
According to Unity documentation, simply adding a 128px by 128 px thumbnail.png file in the root of each template folder is enough to make the editor display a preview. See here: https://docs.unity3d.com/Manual/webgl-templates.html
Describe what changes in documentation you'd like.
Update README.md with proper instructions on how to import a WebGL template, and how to configure PlayerSettings to utilize it. Would also recommend moving a lot of the screenshots to the Documentation~ folder, and perhaps copy the same README to the same folder as well (as index.md).
Tasklist
Document how to import a template
Document where to move the imported files into
Document how to update PlayerSettings to utilize the new templates.