Support `KUBECONFIG` and `--kubeconfig`

[jfroy]

The tool should support the standard ways to use an alternative kubeconfig.

kdiff/src/main.go

Line 98 in 71ff4ce

kubeconfig := filepath.Join(homedir.HomeDir(), ".kube", "config")

https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/

[Senk02]

Awesome, Sorry about that. Will fix now.

[jfroy]

Awesome, Sorry about that. Will fix now.

No need to be sorry, this is a brand new project! Thank you.