deploy: helm charts templates for single-node (#587)

install/helm-single/templates/backend.config.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: backend-config-map
+  labels:
+    app: backend
+  namespace: hydro-namespace
+data:
+  addon.json: |-
+    {{.Values.Backend.AddonJson | nindent 4}}
+
+  config.json: |-
+    {{.Values.Backend.ConfigJson | nindent 4}}