note to self: don't commit templ output while still running watch mode

Required a lot of refactoring to avoid cyclical imports, but we got
there in the end

Closes #1

Closes #2
Closes #3
Closes #4

for all my UNIX girlies out there (myself included)

remove redundant slash in endpoint URL, seek to start of file after
checking header, allow tokens with `create` scope

Untested because so many micropub clients are broken...

First step in adopting Litestream for DB replication

At the project's recommendation

Also add a gitkeep to maintain the `static` directory