Added setup-build-host.sh

devtools/setup-bulid-host.sh

@@ -0,0 +1,73 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo "Run as root, e.g. sudo $0" >&2
+    exit 1
+fi
+
+. /etc/os-release
+
+if [ "${ID:-}" != "debian" ]; then
+    echo "This script is intended for Debian. Detected ID=${ID:-unknown}" >&2
+    exit 1
+fi
+
+echo "==> Removing conflicting Docker packages, if present"
+apt-get remove -y \
+    docker.io \
+    docker-compose \
+    docker-doc \
+    podman-docker \
+    containerd \
+    runc || true
+
+echo "==> Installing minimal repo setup tools"
+apt-get update
+apt-get install -y --no-install-recommends \
+    ca-certificates \
+    curl
+
+echo "==> Adding Docker official APT repo"
+install -m 0755 -d /etc/apt/keyrings
+
+curl -fsSL https://download.docker.com/linux/debian/gpg \
+    -o /etc/apt/keyrings/docker.asc
+
+chmod a+r /etc/apt/keyrings/docker.asc
+
+cat > /etc/apt/sources.list.d/docker.sources <<EOF
+Types: deb
+URIs: https://download.docker.com/linux/debian
+Suites: ${VERSION_CODENAME}
+Components: stable
+Architectures: $(dpkg --print-architecture)
+Signed-By: /etc/apt/keyrings/docker.asc
+EOF
+
+echo "==> Installing build/test packages"
+apt-get update
+apt-get install -y --no-install-recommends \
+    docker-ce \
+    docker-buildx-plugin \
+    qemu-user-static \
+    binfmt-support \
+    make
+
+echo "==> Enabling Docker"
+systemctl enable --now docker
+
+echo "==> Registering binfmt handlers"
+systemctl restart binfmt-support || true
+
+echo "==> Docker version"
+docker --version
+
+echo "==> Buildx version"
+docker buildx version || true
+
+echo "==> Done"
+echo
+echo "Optional: allow your normal user to run docker without sudo:"
+echo "  sudo usermod -aG docker \$USER"
+echo "Then log out and back in."