Alpine Image has no home directory, defaults to /, so needs root

[benbuzbee]

As noted in #154 , you can't run the container as non-root and have gsutil work

$docker run -u $(id -u $USER):$(id -g $USER) -it -e CLOUDSDK_CONFIG=$(pwd)/.gcloud -v $(pwd)/.gcloud:$(pwd)/.gcloud google/cloud-sdk:alpine gsutil ls
OSError: Permission denied.

Why? Because gsutil tries to create ~/.gsutil, and $HOME in the container is set to /, which is owned by root.

Solution: Set $HOME to something anyone can write to.
Suggestion: /tmp

This command would work

$ docker run -u $(id -u $USER):$(id -g $USER) -it -e CLOUDSDK_CONFIG=$(pwd)/.gcloud -v $(pwd)/.gcloud:$(pwd)/.gcloud -e HOME=/tmp google/cloud-sdk:alpine gsutil ls
gs://...
gs://...
gs://...