Improve documentation

[x41lakazam]

Currently it is a bit hard to understand the steps to reproduce in order to create a tunnel.

Especially because the commands are not specified to be for the local or for the remote environment

Having a step-by-step detailed documentation would help a lot.

[maordavidov]

We have a README which contains everything you need to start, basically, it's 2 commands:

1. kubetunnel install
2. sudo -E kubetunnel create-tunnel -p '8080:80' svc_name

Did you manage to use it? if not please use our slack channel and we'll gladly help