Comment on page
To provision a file - means to add a file into the "override" tool-chain with a lowest priority. This would make it discoverable by compiler, while any theme will be able to easily override it.
This is commonly used by extensions which implement changes in the entry-point. In example,
pub/index.phppath. It makes it possible to compile an application using this as an HTML entry-point without manually defining it in a theme.
To provision a file, set the
package.jsonequal to an array, and populate it with desired path to provision.