Add dev gh action and image tag

.github/workflows/dev_image_build.yml

@@ -0,0 +1,38 @@
+name: push dev image to dockerhub
+on:
+  workflow_run:
+    workflows: ["tests"]
+    branches: [main]
+    types:
+      - completed
+
+jobs:
+  push_dev_image_to_dockerhub:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+        with:
+          image: tonistiigi/binfmt:latest
+          platforms: linux/amd64,linux/arm64
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKER_USER }}
+          password: ${{ secrets.DOCKER_PASS }}
+
+      - name: Build and push backuper image
+        uses: docker/build-push-action@v4
+        with:
+          file: Dockerfile
+          context: .
+          push: true
+          tags: rafsaf/backuper:dev
+          platforms: linux/amd64,linux/arm64