I don't know how to self-host. Are there any third-party blogging platforms that support LikeCoin?
For example, if your Liker ID is "ckxpress", your LikeCoin button link will be https://button.like.co/ckxpress
Then, add the link to the Medium article, usually at the end of it. Press "enter" to create a carriage return, and the LikeCoin button will appear automatically.