HelloWorld example configures resources instead of bases

[dbalakirev]

The HelloWorld example comes with a README that instructs people to create some files for overlays.

Example:
`resources:

• ../../base`

This results in:
Error: loadResMapFromBasesAndResources: rawResources failed to read Resources: Load from path ../../base failed: read /home/balakirev/hello/base: is a directory

I think we should just simply instruct people to do this:
`bases:

• ../../base`

This works for me. I will attempt to send a PR for this.

[bzub]

bases is depreciated #1648 (comment)

[jpbochi]

I'm using resources (not bases) pointing to a directory with a kustomization.yaml file, and I get this:

$ kubectl -k ./proton.green/ diff
error: rawResources failed to read Resources: Load from path ./qa/ failed: './qa/' must be a file (got d='[…redected…]/proton.green/qa')

Version:

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.0", GitCommit:"70132b0f130acc0bed193d9ba59dd186f0e634cf", GitTreeState:"clean", BuildDate:"2019-12-13T11:51:44Z", GoVersion:"go1.13.4", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"14+", GitVersion:"v1.14.8-gke.12", GitCommit:"188432a69210ca32cafded81b4dd1c063720cac0", GitTreeState:"clean", BuildDate:"2019-11-07T19:27:01Z", GoVersion:"go1.12.11b4", Compiler:"gc", Platform:"linux/amd64"}

EDIT: nevermind. I eventually realized that kubectl -k uses kustomize v2.0.3, which still relies on bases.

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[marcusjwhelan]

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