Custom widget and github “X-Frame-Options“ “deny“

I am using a selfhost instance of grist, and I wanted to use vuejs and html to print a super simple report.
Because I had a little issue, I decide to move to and github, to ask for help.
Here is the document:
SimpleNote - Grist
Now I am getting an error about “X-Frame-Options“ “deny“ so the user is unable to load the html content.

Where can I host the html file to avoid this error?

I see that you are trying to serve the page using Github indeed does not want that used for embedding. Instead, publish your content using Github Pages: Quickstart for GitHub Pages - GitHub Docs. It will then be available at a URL like <your_username><repo_name>, and will work in an iframe.

Brilliant!. That works!