Bump alpine from 3.15.0 to 3.15.3#13

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dependabot/docker/alpine-3.15.3

Commits on Apr 1, 2022

Bump alpine from 3.15.0 to 3.15.3
dependabot[bot]
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Commits on Apr 2, 2022

Bumped iperf to v
PHLAK
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