Howto integrate Google Calender?

i am very new with hugo.
I want a main menu item that points to a google calendar or a menu item pointing to a site with the google calendar as iframe.
Can you point me to documentation or code sniplets which will point me to the right direction?

My first try will be to put a static html file in the static folder.
But which entry i have to insert in the config.toml file to access the html file from the main menu?

Or is there a much better solution?

Best Regards

Create /content/ add front matter and put inside code of google iframe.

Thank you.