ci: added build docker workflow

Author: kenso312

.github/workflows/build-docker.yml

@@ -0,0 +1,45 @@
+name: Build and Push Docker Image
+
+on:
+  workflow_run:
+    workflows:
+      - Merge to Main Branch
+    types:
+      - completed
+
+jobs:
+  build-and-push-docker-image:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setting Up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Setting Up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0 # Required for github-action-get-previous-tag
+
+      - name: Get Latest Tag
+        id: get-tag
+        uses: WyriHaximus/github-action-get-previous-tag@v1
+        with:
+          fallback: v1.0.0
+
+      - name: Building and Pushing
+        uses: docker/build-push-action@v3
+        if: steps.get-tag.outputs.tag
+        with:
+          push: true
+          file: ./ci/Dockerfile
+          tags: |
+            ${{ github.repository }}:${{ steps.get-tag.outputs.tag }}
+            ${{ github.repository }}:latest