CI: add workflow to build multi-arch images for dockerhub

.github/workflows/dockerhub.yml

@@ -0,0 +1,90 @@
+name: Dockerhub Dev
+
+on:
+  push:
+    branches-ignore:
+      - coverity_scan
+  workflow_dispatch:
+
+env:
+  CI: 1
+  GH_ACTIONS: 1
+  DEBIAN_FRONTEND: noninteractive
+  APT_OPTS: "-y --no-install-recommends"
+  DOCKER_REGISTRY: docker.io
+#  DOCKER_REPOSITORY: freeradius-dev-3.2.x
+  DOCKER_REPOSITORY: freeradius-test
+
+jobs:
+  #
+  #  Run docker target for each given OS and ARCH. This will
+  #  build the Docker images.
+  #
+  docker:
+    runs-on: ubuntu-22.04
+
+    strategy:
+      matrix:
+        env:
+          - { OS: "ubuntu", ARCH: "linux/amd64" }
+          - { OS: "ubuntu", ARCH: "linux/arm/v7" }
+          - { OS: "ubuntu", ARCH: "linux/arm64/v8" }
+          - { OS: "alpine", ARCH: "linux/amd64" }
+          - { OS: "alpine", ARCH: "linux/arm/v6" }
+          - { OS: "alpine", ARCH: "linux/arm/v7" }
+          - { OS: "alpine", ARCH: "linux/arm64/v8" }
+
+      fail-fast: false
+
+    name: "${{ matrix.env.OS }}-${{ matrix.env.ARCH }}"
+
+    steps:
+
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 1
+
+    - name: Regenerate Dockerfiles
+      run: |
+        rm scripts/docker/dists/*/Dockerfile || true
+        make docker.regen
+
+    - name: Install qemu
+      run: |
+        sudo apt-get update
+        sudo apt-get install ${APT_OPTS} qemu-user-static
+
+    - name: Build docker image
+      run: |
+        make docker-${{ matrix.env.OS }} DOCKER_TAG="$DOCKER_REPOSITORY" DOCKER_BUILD_ARGS="--no-cache --platform ${{ matrix.env.ARCH }}"
+        make docker-tag-latest-${{ matrix.env.OS }} DOCKER_TAG="$DOCKER_REPOSITORY"
+
+    - name: Docker images
+      run: |
+        docker image ls -a || true
+
+    - name: Docker inspect
+      run: |
+        docker inspect "freeradius/$DOCKER_REPOSITORY:latest" || true
+        docker inspect "freeradius/$DOCKER_REPOSITORY:latest-alpine" || true
+
+    - name: Docker login
+      uses: docker/login-action@v3
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_PASSWORD }}
+
+    - name: Push images to Docker registry
+      shell: bash
+      run: |
+        make docker-push-latest-${{ matrix.env.OS }} DOCKER_TAG="$DOCKER_REPOSITORY"
+
+    #
+    #  If the CI has failed and the branch is ci-debug then start a tmate
+    #  session. SSH rendezvous point is emited continuously in the job output.
+    #
+    - name: "Debug: Start tmate"
+      uses: mxschmitt/action-tmate@v3
+      with:
+        limit-access-to-actor: true
+      if: ${{ github.ref == 'refs/heads/ci-debug' && failure() }}