Allow custom tools for argo-cd in helm chart (#177)

* enable custom tools in argo helm chart
* add examples
* bump chart version

charts/argo-cd/values.yaml

@@ -554,6 +554,28 @@ repoServer:
  #     - list
  #     - watch
 
+  ## Use init containers to configure custom tooling
+  ## https://argoproj.github.io/argo-cd/operator-manual/custom_tools/
+  ## When using the volumes & volumeMounts section bellow, please comment out those above.
+ #  volumes:
+ #  - name: custom-tools
+ #    emptyDir: {}
+ #
+ #  initContainers:
+ #  - name: download-tools
+ #    image: alpine:3.8
+ #    command: [sh, -c]
+ #    args:
+ #      - wget -qO- https://get.helm.sh/helm-v2.16.1-linux-amd64.tar.gz | tar -xvzf - &&
+ #        mv linux-amd64/helm /custom-tools/
+ #    volumeMounts:
+ #      - mountPath: /custom-tools
+ #        name: custom-tools
+ #  volumeMounts:
+ #  - mountPath: /usr/local/bin/helm
+ #    name: custom-tools
+ #    subPath: helm
+
 ## Argo Configs
 configs:
   knownHosts: