$ go run main.go -h
-help
show help message
-tls-crt string
tls crt file path
-tls-key string
tls key file path
-tls-password string
tls key password
- create ca file, start gRPC api
go run main.go \
-tls-crt ./x-ca/ca/tls-ca.crt \
-tls-key ./x-ca/ca/tls-ca/private/tls-ca.key