Fix proxyd build

[mslipper]

Adds musl headers and GCC to the proxyd build.

[changeset-bot]

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Latest commit: 980d0dd

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[Inphi]

LGTM. One note; buster is a larger baseimage than alpine. Not by much though.

[mslipper]

Yeah. I used buster slim for the output image to cut down on some size. Unless we pull libc into Alpine I don't see a way around this.

[codecov-commenter]

Codecov Report

Merging #2012 (980d0dd) into develop (235c7af) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #2012   +/-   ##
========================================
  Coverage    74.58%   74.58%           
========================================
  Files           79       79           
  Lines         2554     2554           
  Branches       401      401           
========================================
  Hits          1905     1905           
  Misses         649      649           

Flag	Coverage Δ
batch-submitter	62.50% <ø> (ø)
contracts	90.48% <ø> (ø)
core-utils	57.50% <ø> (ø)
data-transport-layer	38.64% <ø> (ø)
message-relayer	70.86% <ø> (ø)
sdk	88.38% <ø> (ø)

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[tynes]

Our geth image runs in alpine - https://github.com/ethereum-optimism/optimism/blob/develop/ops/docker/Dockerfile.geth

Also other services with geth use alpine

• https://github.com/ethereum-optimism/optimism/blob/develop/ops/docker/Dockerfile.gas-oracle
• https://github.com/ethereum-optimism/optimism/blob/develop/ops/docker/Dockerfile.batch-submitter-service

Perhaps this is a versioning issue?

[tynes]

Upstream also uses alpine https://github.com/ethereum/go-ethereum/blob/master/Dockerfile

[mslipper]

Wow, well I was completely wrong. Fixed by adding musl headers to alpine.