fabro/docker/entrypoint.sh
Bryan Helmkamp 0f029d6b02
feat(docker): switch runtime image to Alpine on musl
Now that the release workflow publishes musl binaries, the runtime
image can drop the debian:trixie-slim base for alpine:3.22. The
image shrinks from ~287 MB to ~96 MB (66% smaller) with a smaller
attack surface.

- Dockerfile: alpine:3.22 base, apk packages (ca-certificates git
  tini su-exec), BusyBox adduser/addgroup, tini at /sbin/tini.
- entrypoint.sh: replace runuser with su-exec, Alpine's idiomatic
  drop-privileges helper.
- release.yml docker job: pull the two linux-musl artifacts instead
  of linux-gnu. The docker image and the Alpine install.sh path now
  ship the same binary.
- bin/dev/docker-build.sh: compile fabro-cli for the host's musl
  target in rust:1-bookworm with musl-tools, the matching CC/LINKER
  env vars, and LIBZ_SYS_STATIC=1. Same pattern as CI.

Verified locally on aarch64: Alpine image builds, server binds on
$PORT (default 32276), endpoints return 200, fabro server process
runs as unprivileged UID 1000 under tini.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-18 02:10:18 -04:00

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#!/bin/sh
set -eu
# When started as root (the default), ensure the storage volume is writable
# by the unprivileged fabro user, then drop privileges.
if [ "$(id -u)" = 0 ]; then
chown fabro:fabro /storage
exec su-exec fabro "$@"
fi
exec "$@"