Default Index.html File requires there to be a file name index.html at the root level of a project. This index.html file will be the loaded by when visitors go to your site at

This index.html file must minimally have an <html> tag and optimally a <head> tag. If there is not <head> tag present, will create one.

The index.html should not include a service worker, links to icons, or links to a web manifest– will add them.