improved ssh service connector

[doodlesbykumbi]

Run the following for the latest code vs this new code:

secretless.yml

version: 2

services:
  git:
    connector: ssh
    listenOn: tcp://0.0.0.0:2222
    credentials:
      user: git
      privateKey:
        from: file
        get: $HOME/.ssh/id_rsa
      address: ssh.github.com:443

1. Run Secretless
2. Run SSH Client

ssh -T x@localhost -p 2222