Follow steps 1-5 from Klei's Dedicated Server Quick Setup Guide - Windows to setup SteamCMD and MyDediServer.
Open Steam and start Don't Starve Together. Click Host Game and setup a new game with any mods you want enabled. Once the server is started, exit out and go back to Host Game. Find your new server and click the folder icon to get the the folder location of your 'cluster'
Download and unzip or clone this git repository to obtain the new StartDSTServers.bat file.
Right click > Edit StartDSTServers.bat and adjust the three variables as necessary (be sure to keep the quotation marks at the end of each line), then save it wherever you'd like.
Close your text editor and double click StartDSTServers.bat to start your server.