Provide solution message for unnecessary sudo

[medyagh]

Running minikube with "sudo" privileges is not necessary in some cases causes issues. (such as host env vars)

We need to provide a solution message (warning) not to run minikube in sudo:

"Please don't run minikube as root or with "sudo" privileges. It isn't necessary."

[djmgit]

@medyagh I would like to work on this.
I am new to kube contribution, any hints and pointers will be of great help :)

[medyagh]

Awesome @djmgit ! Thank you for offering to help, yes please.

I look forward to review your PR :) please make sure to sign the CLA

[medyagh]

@djmgit I suggest using golang "os/user" std lib package:
here are things u can do :

import "os/user"

u, err := user.Current()
// check for errors
// check if u.Username is root , then add a console warning with a right emoji (check the start cmd for the example console warnings) 

important thing is make sure it works on both windows and mac and linux ( the go package seems to be working on all but make sure )

[medyagh]

@djmgit one more detail is, the sudo is required for --vm-driver hyperv so the message should not warn users who are using hyperv

[djmgit]

@medyagh thanks a lot for the pointers, I will send a PR ASAP

[djmgit]

@medyagh I have submitted a PR for this. Let me know what changes need to be made.