@fitheach Yep but I think it's the first interaction with mstdn.io. But maybe microblog.pub is missing an endpoint that prevent Mastodon from fetching existing activities (as this mechanism is not part of ActivityPub, this will be "Mastodon" specific).
Fast, secure and up-to-date instance, welcoming everyone around the world....Mastodon hosted on mstdn.io
I hope I will be able to release a "v1" in September, I think it will stay pretty simple, as explained on the project README (https://github.com/tsileo/microblog.pub).
For Docker, it's not a requirement, it's just that the setup is a little complex so it greatly simplifies things. I have to update the documentation on deploying, but as of right now, I would not advise to run an instance as it's still too buggy.
A self-hosted, single-user, ActivityPub powered microblog. - tsileo/microblog.pubGitHub
The design/UI is optimized for small notes, and no characters limit.
And I will fill an issue, as for now you can only upload 1 attachment :p But same here,no limit (but then I don't know how it will display on Mastodon, like if only the first x images will be displayed).