ci: Enable github CI for developers forks

.github/workflows/build.yml

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+# YAML -*- mode: yaml; tab-width: 2; indent-tabs-mode: nil; coding: utf-8 -*-
+# SPDX-License-Identifier: LicenseRef-MSLA
+# SPDX-Copyright-Text: (c) 2024 Silicon Laboratories Inc. (www.silabs.com)
+---
+name: Docker Image CI
+
+on:  # yamllint disable-line rule:truthy
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/[email protected]
+        with:
+          fetch-depth: 0
+      - name: Build Docker image from sources
+        run: docker build .

Dockerfile

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+#!/bin/echo run with: docker build . -f
+# SPDX-License-Identifier: LicenseRef-MSLA
+# SPDX-Copyright-Text: (c) 2024 Silicon Laboratories Inc. (www.silabs.com)
+
+FROM debian:12
+
+RUN echo "# log: Setup system"  \
+  && set -x \
+  && apt-get update -y \
+  && apt-get install -y sudo make \
+  && date -u
+
+ENV project wisun-br-linux
+ENV workdir /usr/local/src/${project}
+WORKDIR ${workdir}
+COPY helper.mk ${workdir}
+RUN echo "# log: Setup ${project}" \
+  && set -x  \
+  && ./helper.mk setup \
+  && date -u
+
+COPY . ${workdir}
+WORKDIR ${workdir}
+RUN echo "# log: Build ${project}" \
+  && set -x  \
+  && ./helper.mk prepare build \
+  && date -u

helper.mk

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+#!/usr/bin/make -f
+# -*- makefile -*-
+# ex: set tabstop=4 noexpandtab:
+# -*- coding: utf-8 -*
+#
+# SPDX-License-Identifier: LicenseRef-MSLA
+# SPDX-Copyright-Text: (c) 2024 Silicon Laboratories Inc. (www.silabs.com)
+
+tmpdir?=${CURDIR}/tmp
+
+sudo?=sudo
+
+export CMAKE_PREFIX_PATH=${tmpdir}/usr/local/cmake
+
+debian_packages?=build-essential \
+  git cmake sudo rustc pkg-config \
+  libnl-route-3-dev libdbus-1-dev
+
+mbedtls_url?=https://github.com/ARMmbed/mbedtls
+mbedtls_rev?=v3.0.0
+
+
+build:
+	cmake .
+	cmake --build .
+	make install DESTDIR="${tmpdir}"
+
+mbedtls:
+	git clone --branch=${mbedtls_rev} --recursive --depth=1 ${mbedtls_url}
+
+prepare: mbedtls
+	cd $< \
+	&& cmake . \
+	&& cmake --build . \
+	&& make install DESTDIR="${tmpdir}"
+
+setup:
+	${sudo} apt-get install -y ${debian_packages}
+