Drops the building of armv7 and removes most stuff the image does for it

.github/workflows/ci.yml

@@ -325,6 +325,8 @@ jobs:
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2
+        with:
+          platforms: arm64
       -
         name: Login to Github Container Registry
         uses: docker/login-action@v2
@@ -355,7 +357,7 @@ jobs:
         with:
           context: .
           file: ./Dockerfile
-          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          platforms: linux/amd64,linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.docker-meta.outputs.tags }}
           labels: ${{ steps.docker-meta.outputs.labels }}