Leverage forgejo actions

.forgejo/workflows/docker-build.yaml

@@ -0,0 +1,37 @@
+name: ci
+
+on:
+  push:
+
+jobs:
+  builder:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up context for Docker Buildx
+        run: docker context create builders
+
+      - name: Set up Docker Build
+        uses: docker/setup-buildx-action@v2
+        with:
+          version: latest
+          endpoint: builders
+
+      - name: Login to Docker Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ vars.REGISTRY_URL }}
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_TOKEN }}
+      
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ vars.REGISTRY_URL }}/${{ env.GITHUB_REPOSITORY }}:latest