Add WebDAV backup sync and armv7 Docker builds

.github/workflows/ci.yml

@@ -314,6 +314,9 @@ jobs:
           - arch: arm64
             platform: linux/arm64
             runner: ubuntu-24.04-arm
+          - arch: armv7
+            platform: linux/arm/v7
+            runner: ubuntu-latest
 
     steps:
       - name: Checkout
@@ -329,6 +332,10 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v4
 
+      - name: Set up QEMU
+        if: matrix.arch == 'armv7'
+        uses: docker/setup-qemu-action@v4
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v4
         with:
@@ -419,5 +426,6 @@ jobs:
             docker buildx imagetools create \
               --tag "$tag" \
               "${tag}-amd64" \
-              "${tag}-arm64"
+              "${tag}-arm64" \
+              "${tag}-armv7"
           done <<< "${{ steps.meta.outputs.tags }}"