The path of the file to serve. Depending on the from option, it will be either
relative to the project root, or the application executable.
Optionalfrom?: stringThe name of a location on the pathUtils service from where the filepath is
relative to. It can be app for the directory containing the application executable,
or project for the project root. It could also be any other location that the
implementation may have registered.
Optionalnext?: NextFunctionThe function to move to the next middleware. It can be used to report an error in case the file can't be served.
The response object sent by the application. Necessary to write the file.
The options for the function that actually serves a file.