Vaping

Fixed
- pin Flask to < 2.2 until compatibility isuses are resolved

Fixed
- pin Werkzeug to 2.0.3 until compatibility issues are resolved

Added
- prometheus export plugin
- python 3.10 support
Fixed
- mtr graph ignores * lines for now (135,
- fping sometimes emits None messages (138)
- defunct/zombie processes for fping (133, thanks to mattlan)
Removed
- python3.6 support

Fixed
- zmq.asyncio has no attribute `PUB` (128)
- zmq plugin configuration collision between bind and connect (126)

Fixed
- missing config deps (123)
- install the actual package in the container image (122)

Added
- container build tests
Fixed
- container build