Nginx Ingress Basic Auth

[lalyos]

Implement nginx ingress basic-auth

if you add:

ingress:
  host: secret.k8z.eu
  nginxBasicAuth:
    user: admin1
    password: secret1

You will get:

• a secret named: basic-auth with bcrypt encoded http password, using the htpasswd sprig function
• 3 annotations on the ingress:

  annotations:
    nginx.ingress.kubernetes.io/auth-type: basic
    nginx.ingress.kubernetes.io/auth-secret: basic-auth
    nginx.ingress.kubernetes.io/auth-realm: 'Authentication Required - basic'

[laszlocph]

Thank you for the amazing contribution!

I merge this now (and adjust slightly)