Have GH Actions workflow to publish Docker image

.github/workflows/docker_publish.yml

@@ -0,0 +1,45 @@
+on:
+  push:
+    tags:
+      - '.*'
+  workflow_run:
+    workflows: ["Test code"]
+    branches: [master, develop]
+    types:
+      - completed
+
+name: Docker Build
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check Out Repo
+        uses: actions/checkout@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Extract tag name
+        id: extract_tag_name
+        shell: bash
+        run: echo "##[set-output name=tag;]$(echo ${GITHUB_REF##*/})"
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: ./
+          file: ./Dockerfile
+          push: true
+          tags: napalmautomation/napalm-logs:${{ steps.extract_tag_name.outputs.tag }}
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}