or must you have the file served over the internet first? I want to see how the solution looks when running as webdirect (in a browser) as I am building it. How is that commonly done?
FileMaker Developer Subscribers get a "testing only" version of FMServer (latest version) Development License to do precisely what you need to do ("see how the solution looks when...")
allows up to three (3) simultaneous connections for FileMaker Pro, three (3) simultaneous web-based client connections for Custom Web Publishing, and one (1) User Connection for FileMaker WebDirect, FileMaker Go, or FileMaker Pro (for User Connections)
Not "over the internet", but you need to deploy FMS and upload the database to the server.
Retrieving data ...