add github actions workflow

Author: rgl

.dockerignore

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+.*/
+build/
+Dockerfile*

.github/workflows/build.yml

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+name: Build
+on:
+  - push
+jobs:
+  build:
+    name: Build
+    strategy:
+      matrix:
+        include:
+          - image_name: debian
+            image_tag: 11
+          - image_name: ubuntu
+            image_tag: 20.04
+          - image_name: ubuntu
+            image_tag: 22.04
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Build
+        run: |
+          set -euxo pipefail
+          export DOCKER_BUILDKIT=1
+          docker build \
+            --progress=plain \
+            --output=build \
+            --target=artifacts \
+            --build-arg=IMAGE=${{ matrix.image_name }}:${{ matrix.image_tag }} \
+            .
+          for p in build/*.deb; do
+            mv "$p" "${p/-Linux\.deb/-${{ matrix.image_name }}-${{ matrix.image_tag }}.deb}"
+          done
+      - name: Archive
+        uses: actions/upload-artifact@v2
+        with:
+          name: Artifacts
+          path: |
+            build/*.deb

Dockerfile

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+ARG IMAGE=debian:11
+ARG NETWORK_NM=OFF
+ARG NETWORK_CM=OFF
+FROM ${IMAGE} as build
+ENV DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC
+RUN apt-get update && \
+    apt-get install -y \
+        cmake \
+        file \
+        g++ \
+        git \
+        python3 \
+        libace-dev \
+        libglib2.0-dev \
+        libcurl4-openssl-dev \
+        libxerces-c-dev \
+        libnl-3-dev \
+        libnl-route-3-dev \
+        libxml2-dev
+COPY . /lms/
+RUN set -x && \
+    cd /lms && \
+    mkdir build && \
+    cd build && \
+    cmake \
+        -DCMAKE_INSTALL_PREFIX=/usr \
+        -DNETWORK_NM=${NETWORK_NM} \
+        -DNETWORK_CM=${NETWORK_CM} \
+        .. && \
+    make -j$(nproc) package && \
+    dpkg-deb --info *.deb && \
+    dpkg-deb --contents *.deb
+
+FROM scratch as artifacts
+COPY --from=build /lms/build/*.deb /