Guide how I install cpw's serverpacklocator on Windows for Minecraft versions 1.14.4+. This is not an offical guide and may break at any time. Use at your own risk.
Install a basic dedicated Minecraft Forge server and whitelist all players, which want to play on the server. Then download the Mod-version from here. and place it into the mods folder in the server folder. Start the server once to generate all needed files. Go into the servermods folder and open the serverpacklcoator.toml file with a text editor. Change the name to the ip/dns name of the server. You can also change the port of the http server (Note: This is not the minecraft server port!). Delete the cacert.pem and ca.key file and start and stop the server.
Install Forge on the client. Download the Bundle from here