This mainly adds a main.go file in the project root so it's easier to
install pcap-broker using `go install`:
$ go install github.com/fox-it/pcap-broker@latest
Or install the main branch:
$ go install github.com/fox-it/pcap-broker@main
* Use zerolog + intercept SIGINT
* Use RFC3339 for time format and add -json flag to disable pretty printing
* Added new flags to README and fixed issue when command exit was not successful
