You’ll put your league’s files online for your owners to download and insert into their own copy of the game. Ideally you’ll put these files together in a compressed package, a Zip file (often simply called a ‘league file’) which owners can download quickly and extract on their own computer. Any given league file should contain all the necessary game files for an owner to set up your league on their own machine.
The best example would be for you to go to a
current online league and download their file. Take a look at it, most leagues do it the same way.