This allows us to skip sticking it onto each request context and retrieving it.

Signed-off-by: Dan Lorenc <dlorenc@google.com>

This runs against a running setup, and does a single upload of some node
data.

Clear up the stuff we no longer use and add some basic files
for test purposes (integration tests / local developement)

Implement upload command

Accept flags artifact-url,public-key, signature and validate GPG formatting and verify file signature