feat(ci): aarch64 (#59)

* workflow: Build for aarch64

* feat(ci): limit qemu to aarch64

Co-authored-by: Evangelos Paterakis <evan@geopjr.dev>

.github/workflows/build.yml

@@ -10,9 +10,26 @@ jobs:
     container:
       image: bilelmoussaoui/flatpak-github-actions:gnome-43
       options: --privileged
+    strategy:
+      matrix:
+        arch: [x86_64, aarch64]
+      # Don't fail the whole workflow if one architecture fails
+      fail-fast: false
     steps:
     - uses: actions/checkout@v3
+    # Docker is required by the docker/setup-qemu-action which enables emulation
+    - name: Install deps
+      if: matrix.arch == 'aarch64'
+      run: dnf -y install docker
+    - name: Set up QEMU
+      if: matrix.arch == 'aarch64'
+      id: qemu
+      uses: docker/setup-qemu-action@v2
+      with:
+        platforms: arm64
     - uses: flatpak/flatpak-github-actions/flatpak-builder@v5
       with:
         bundle: "dev.geopjr.tooth.Devel.flatpak"
         manifest-path: "dev.geopjr.tooth.Devel.json"
+        cache-key: flatpak-builder-${{ github.sha }}
+        arch: ${{ matrix.arch }}