One can associate a unique URL to the location where the generated blog content is stored using PagePark. In this instance PagePark is basically acting as a reverse proxy, none of your content is stored on your own server.
Dave does provide Mac version of the Drummer front end that is based on Electron. He may provide Windows and Linux versions of the app. The Electron version of the app will enable you to store and edit your source content OPML files on your own computer, but from what I can tell the published content will still be hosted on Dave’s server.
From what I have read, the desktop version of Drummer is intended to be near to or equal to the OPML Editor. For my purposes it is most desirable to have the desktop version of this application.
Final note, a check of the source to the HTML file of the blog shows that nearly all of the “script src” tags have been changed and it looks like if one hosts PagePark on a server/container that supports HTTPS you might have success in accessing the blog via HTTPs.
My Drummer blog is at oldschool.scripting.com/frankm/.