docker: bring Dockerfile in line with Alpine 3.23 / GHC 9.12.4 CI#57
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PR #52 unified CI on Alpine 3.23 + GHC 9.12.4 but left docker/Dockerfile on alpine:3.19. That combination is now broken end-to-end: - ghcup install ghc 9.12.4 has no alpine3_19 bindist; the alpine3_20 fallback fails at `gmake install` on a 3.19 base. - Bumping the base to 3.23 surfaces a second issue: Alpine 3.23 split the static libgmp out into its own `gmp-static` package, so the final static link fails with `cannot find -lgmp` unless we add it explicitly. Both build and runtime stages move to alpine:3.23 (matches CI) and the build stage gains gmp-static alongside the other *-static packages.
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Summary
docker/Dockerfileonalpine:3.19. That combination is now broken end-to-end:ghcup install ghc 9.12.4has noalpine3_19bindist; thealpine3_20fallback fails atgmake installon a 3.19 base.libgmp.aout into its owngmp-staticpackage, so the final static link fails withcannot find -lgmpunless we add it explicitly.alpine:3.23(matches CI) and the build stage gainsgmp-staticalongside the other*-staticpackages.Test plan
docker build -f docker/Dockerfile -t volca .completes end-to-end on Linux/amd64docker run --rm volca --help) and reports the expected versionvolca-deploy'svolca/docker-build.sh --with-frontendoverlay build no longer trips on the missing/data/bundled snapshot