Use k8s docker driver for buildx

Signed-off-by: Martyn Ranyard <m@rtyn.berlin>

.forgejo/workflows/ci.yaml

@@ -8,10 +8,17 @@ jobs:
       - run: ip route show
       - name: Check out repository code
         uses: actions/checkout@v3
-      - name: Hah, right...
+      - name: Create Kubeconfig
+        run: |
+          mkdir $HOME/.kube
+          echo "${{ secrets.KUBECONFIG_BUILDX }}" > $HOME/.kube/config
+      - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
         with:
-          endpoint: tcp://172.24.0.1:2376
+          driver: kubernetes
+          driver-opts: |
+            namespace=git
+            qemu.install=false
       - name: Login to forgejo
         uses: docker/login-action@v3
         with: