initial debian automation for GHA

.github/workflows/debian.yml

@@ -0,0 +1,49 @@
+name: Passenger Debian packaging tests
+
+env:
+  ENTERPRISE: 0
+
+on:
+  push:
+    branches: [ 'stable-*', 'feature/*' ]
+  pull_request:
+    branches: [ 'stable-*', 'feature/*' ]
+
+jobs:
+  define-matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      distros: ${{ steps.distros.outputs.distros }}
+    steps:
+      - name: Define Distros
+        id: distros
+        run: echo "distros=[$(awk -F= '/DEFAULT_DISTROS/{print $2}' packaging/debian/internal/lib/distro_info.sh | sed -e 's/ /", "/g')]" >> "$GITHUB_OUTPUT"
+
+  test:
+    name: "Test ${{ matrix.distro }} packages"
+    needs: define-matrix
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        distro: ${{ fromJSON(needs.define-matrix.outputs.distros) }}
+        arch:
+          - amd64
+          - arm64
+    env:
+      WORKSPACE: ${{ github.workspace }}
+      ARCHITECTURE: ${{ matrix.arch }}
+      CACHE_DIR: ${{ github.workspace }}/cache/debian-test/${{ matrix.distro }}-${{ matrix.arch }}
+      DISTRIBUTION: ${{ matrix.distro }}
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: true
+    - uses: docker/setup-qemu-action@v3
+    - uses: docker/setup-buildx-action@v3
+    - run: ./dev/ci/tests/debian/run
+    - run: ls -R "$WORKSPACE/output"
+    # - uses: actions/upload-artifact@v4
+    #   with:
+    #     name: debian-${{ matrix.distro }}-${{ matrix.arch }}
+    #     path: '**/*'