Thanks to Amos and Binaryclipse for the answers,
I have read the existent documentation in https://github.com/itchio https://itch.io/docs/creators/refinery; I have already installed Butler and made a preview page of my project, but I still can not find information on how I can put my project in the refinery. I'd really appreciate it if you could point me in the right direction once more, thank you once again for taking your time in helping me out.