Added node selector for helm chart (#185)

Issue #, if available:

Description of changes: Added nodSelector label to allow options in case cluster has window and linux nodes. Set default value to linux node.

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Author: sk1p3r009

templates/helm/templates/deployment.yaml

@@ -77,3 +77,4 @@ spec:
         - name: ACK_RESOURCE_TAGS
           value: {{ join "," .Values.resourceTags | quote }}
       terminationGracePeriodSeconds: 10
+      nodeSelector: {{ toYaml .Values.deployment.nodeSelector | nindent 8 }}

templates/helm/values.yaml.tpl

@@ -15,6 +15,8 @@ deployment:
   annotations: {}
   labels: {}
   containerPort: 8080
+  nodeSelector:
+    kubernetes.io/os: linux
 
 metrics:
   service: