title: Provide nodeSelector to nginx ingress using helm
body: <p>I spent some time looking into how to pass the parameters to helm in order to configure the <code>nodeSelector</code> properly.</p>
  
  <p>Different tries led to different errors like:</p>
  
  <pre><code>Error: unable to build kubernetes objects from release manifest: error validating "": error validating data: ValidationError(Deployment.spec.template.spec.nodeSelector.kubernetes): invalid type for io.k8s.api.core.v1.PodSpec.nodeSelector: got "map", expected "string"
  </code></pre>
  
  <pre><code>coalesce.go:196: warning: cannot overwrite table with non table for nodeSelector (map[])
  </code></pre>