ARG BASE_IMAGE=mirror.gcr.io/library/debian:bookworm-slim
FROM ${BASE_IMAGE}
ARG SINGBOX_VERSION=1.12.13

RUN apt-get update \
    && apt-get install -y --no-install-recommends ca-certificates curl iptables ipset iproute2 nodejs dumb-init \
    && rm -rf /var/lib/apt/lists/*

RUN set -eux; \
    arch="$(dpkg --print-architecture)"; \
    case "$arch" in \
    amd64) sb_arch="amd64" ;; \
    arm64) sb_arch="arm64" ;; \
    *) echo "Unsupported architecture: $arch" >&2; exit 1 ;; \
    esac; \
    curl -fsSL "https://github.com/SagerNet/sing-box/releases/download/v${SINGBOX_VERSION}/sing-box-${SINGBOX_VERSION}-linux-${sb_arch}.tar.gz" -o /tmp/sing-box.tgz; \
    tar -xzf /tmp/sing-box.tgz -C /tmp; \
    mv "/tmp/sing-box-${SINGBOX_VERSION}-linux-${sb_arch}/sing-box" /usr/local/bin/sing-box; \
    chmod +x /usr/local/bin/sing-box; \
    rm -rf /tmp/sing-box*