Prepare Alpine artifact deploy workflow

deploy/scripts/build-linux-release.sh

@@ -2,21 +2,26 @@
 set -euo pipefail
 
 ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
-IMAGE="${DOCKER_IMAGE:-node:20-bookworm-slim}"
-ARTIFACT_NAME="${ARTIFACT_NAME:-abelbirdnest-release.tar.gz}"
+IMAGE="${DOCKER_IMAGE:-node:20-alpine}"
+RELEASE_STAMP="${RELEASE_STAMP:-$(date +%Y%m%d-%H%M%S)}"
+ARTIFACT_NAME="${ARTIFACT_NAME:-abelbirdnest-release-${RELEASE_STAMP}.tar.gz}"
 NODE_MEMORY_MB="${NODE_MEMORY_MB:-4096}"
 
 cd "$ROOT_DIR"
 
+if ! command -v docker >/dev/null 2>&1; then
+  echo "Docker is required to build the Alpine Linux release artifact." >&2
+  exit 1
+fi
+
 docker run --rm \
   -v "$ROOT_DIR":/src:ro \
   -v "$ROOT_DIR":/out \
   -w / \
   "$IMAGE" \
-  bash -lc '
-    set -euo pipefail
-    apt-get update >/dev/null
-    apt-get install -y --no-install-recommends openssl >/dev/null
+  sh -lc '
+    set -eu
+    apk add --no-cache openssl >/dev/null
     rm -rf /work
     mkdir -p /work
     cp -R /src/. /work/