add: image build action

Author: niwaniwa

.github/workflows/docker-image-build.yml

@@ -0,0 +1,39 @@
+name: Docker Image CI
+
+on:
+  workflow_dispatch:
+      
+env:
+  DOCKER_REGISTRY_NAME: ghcr.io
+  DOCKER_IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.DOCKER_REGISTRY_NAME }}
+          username: ${{ github.repository_owner }}
+          password: ${{ github.token }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ${{ env.DOCKER_REGISTRY_NAME }}/${{ env.DOCKER_IMAGE_NAME }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}