feat(branches): prepare for dev branch

.forgejo/workflows/build-dev.yaml

@@ -0,0 +1,39 @@
+name: build dev image
+
+on:
+  push:
+    branches:
+      - dev
+
+jobs:
+  build-dev:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_ACCESS_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          endpoint: tcp://forgejo-docker-in-docker-1:2375
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: ./docker-build/
+          file: ./docker-build/Dockerfile
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          push: true
+          cleanup: true
+          tags: |
+            ${{ secrets.DOCKER_USER }}/docker-owndyndns-netcup:dev

.forgejo/workflows/build.yaml

@@ -1,4 +1,4 @@
-name: build container image
+name: build image
 
 on:
   push: