Add helm to pulumi/pulumi dockerhub container (#3294)

CHANGELOG.md

@@ -60,6 +60,9 @@ CHANGELOG
 
 - Support renaming stack projects via `pulumi stack rename`.
   [#3292](https://github.com/pulumi/pulumi/pull/3292)
+  
+- Add `helm` to `pulumi/pulumi` Dockerhub container
+  [#3294](https://github.com/pulumi/pulumi/pull/3294)
 
 - Make the location of `.pulumi` folder configurable with an environment variable.
   [#3300](https://github.com/pulumi/pulumi/pull/3300) (Fixes [#2966](https://github.com/pulumi/pulumi/issues/2966))

dist/docker/Dockerfile

@@ -46,6 +46,9 @@ RUN apt-get update -y && \
   # Clean up the lists work
   rm -rf /var/lib/apt/lists/*
 
+# Install Helm
+RUN curl -L https://git.io/get_helm.sh | bash
+
 # Passing --build-arg PULUMI_VERSION=vX.Y.Z will use that version
 # of the SDK. Otherwise, we use whatever get.pulumi.com thinks is
 # the latest