Add a log shipper

[jacobweinstock]

Currently, we send Workflow container logs to a single syslog server. This is the only option. It would be great to be able to send logs to a different collector or to multiple collectors. Some proposed constraints:

• very lightweight
• configurable on start up or on the fly
• be able to send to multiple collectors
• logs must always be available locally from HookOS via the docker logs command
• must support Docker and Containerd (Containerd will hopefully be the default runtime in the future)
• must support the existing syslog setup
• nice to have if it can collect and ship Linux system logs like kernel messages, onboot, and service containers, etc.