Making some improvements to the future maintainability of the project,
namely in the form of tests. Also implemented a new "dist" command to
the Makefile that packs up the binaries, and will eventually be expanded
to do more legwork when prepping for a release.
Updated file providers to use io.Reader over an explicit multipart file,
and removed the handler in favour of a plain filename, since that was
it's primary purpose.
Implemented file upload progress to the frontend using XMLHttpRequests,
since fetch() doesn't offer this functionality right now. Bit of a
fragmented approach to requests in the codebase right now, but hope to
resolve this soon. Not styled at all either.
Also added some nifty commands to the Makefile for producing smaller
binaries using some compiler flags and upx, and requires upx to be
installed (make small and make small_pi).
Reworked the fileprovider to proxy data directly from the provider
rather than attempt to funkily redirect when needed, since it was overly
complex and wouldn't work well in the long run. Temporarily added "file"
as constant return for determining the filetype through Backblaze.
Added a Makefile to make life easier as well, and rewrote the README to
reflect the refactor/rewrite and new approach to providers.
