Test project used to connect to private database servers using a stepping-stone server
go install github.com/mehix/sshtunnel/cmd/sshtunnel
sshtunnel <local-addr> <stepping-stone> <pk-file> <remote-private-addr>
local-addr: can be IP:PORT but also IP:0 and the port will be random and displayed at runtime
stepping-stone: user@server
pk-file: ssh private key used to connect to the stepping-stone server. The password can be provided in a file called .secret
remote-private-addr: IP:PORT of the server we actually want to connect to