actions: Install docker with arm64 quemu

Flatpak builder needs this to compile aarch64 package

.github/workflows/flatpak-nightly.yml

@@ -17,6 +17,14 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: recursive
+    - name: Install Docker
+      run: |
+        dnf -y install docker
+    - name: Setup QEMU
+      id: qemu
+      uses: docker/setup-qemu-action@v1
+      with:
+        platforms: arm64
     - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@v4
       name: "Build"
       with:

.github/workflows/flatpak.yml

@@ -21,6 +21,14 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: recursive
+    - name: Install Docker
+      run: |
+        dnf -y install docker
+    - name: Setup QEMU
+      id: qemu
+      uses: docker/setup-qemu-action@v1
+      with:
+        platforms: arm64
     - uses: bilelmoussaoui/flatpak-github-actions/flatpak-builder@v4
       name: "Build"
       with: