Merge pull request #48 from onitake/fix-release-artifacts

Fix artifact downloads

Implement static preamble (#43)

* Add script to generate silent, black videos

* Implement static preamble from file

* Fix json tag

* Fix logs

* Shorten preamble generator to 1s

* Document preamble option in config example

Don't create another tag for the release

Merge pull request #37 from onitake/fix/go-1-19

Update dependencies and build with Go 1.19

Added release build targets to makefile

Added release build targets to makefile

Implement Prometheus metrics

* Moved metrics into separate package

* Implemented a typed metric data holder

* Partial implementation of an async stats collector

* Fixed some more metrics package refs in unit test

* Implemented multi-value collector and return

* Added the other datum convenience constructors

* Added a few more unit tests

* Cleaned up unit test

* Made Metric.MakeKey public

* go fmt

* Added dummy metrics collector and hid real collector behind interface

* Started integrating new collector

* Test implementation of new metrics lib

* Added missing package prefix

* Refactored collector structure (fetch is WIP)

* Added go module stuff to makefile

* Added prometheus deps

* Implemented prometheus metrics for client

* Implemented prometheus endpoint

* Registered client prom metrics on default registry

* Removed obsolete metrics framework

* Implemented prometheus metrics for streamer

* Documented new prometheus api resource

* Removed Go 1.6 and 1.9 from tested versions, as Promtheus needs at least 1.9

* Prevent default promtheus metrics from being exported

* Added network stats in bytes

* Added default process metrics and enabled Go metrics if profiling is enabled

* Updated readme with new info about prom metrics

* Updated copyright

* Updated metrics doc formatting

Merge pull request #20 from onitake/feature/control

Implement stream offline/online control with HTTP authentication

Added content types to API responses

Fixed and improved auth handling for notifications