Add workflow for automatic uploading

.forgejo/workflows/upload.yml

@@ -0,0 +1,23 @@
+name: upload
+
+on:
+ - push
+
+jobs:
+ upload:
+  runs-on: docker
+  steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Login to sos!git
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          tags: staropensource/actions-docker:latest