fix: delete volumes when make docker_down

[Lan-ce-lot]

What type of PR is this?

What this PR does / why we need it:

When running make docker_down, we want to delete the Volume of etcd. So we use the --volumes.

docker-compose down --volumes

Which issue(s) this PR fixes:

Fixes #315

Special notes for your reviewer:

/label tide/merge-method-squash

[k8s-ci-robot]

Hi @Lan-ce-lot. Thanks for your PR.

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[sanposhiho]

/lgtm
/approve
/ok-to-test

Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Lan-ce-lot, sanposhiho

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