New Installation breaks tool

[embano1]

Hi Ashley,

Thx for switching to goreleaser :)

I found some issues with the new installation procedure:

export BINARY=kubeconfig-cleanup_1.0.1_Linux_x86_64.tar.gz
curl -LO -o cleanup https://github.com/ashleyschuett/kubeconfig-cleanup/releases/download/v1.0.1/$BINARY && \
curl -LO https://raw.githubusercontent.com/ashleyschuett/kubeconfig-cleanup/v1.0.1/plugin.yaml && \
mkdir ~/.kube/plugins/kubeconfig-cleanup && mv cleanup plugin.yaml

1. The BINARY is a tgz, meaning that it must be extracted first and not just moved (will error out with error: fork/exec ./cleanup: exec format error)
2. The binary then has to be executable (chmod +x), otherwise error: fork/exec ./cleanup: permission denied
3. curl -LO -o does not work because -o has no effect here (just remove -O to fix)
4. mkdir should use option -p to not error out when plugins does not exist or when kubeconfig-cleanup already exists (e.g. upgrade)
5. the mv needs a target folder, i.e. mv cleanup plugin.yaml ~/.kube/plugins/kubeconfig-cleanup

Will file PR :)