add docker build

Signed-off-by: eternal-flame-AD <yume@yumechi.jp>

.forgejo/workflows/docker.yml

@@ -0,0 +1,74 @@
+name: Publish Docker image
+
+on:
+  push:
+    branches:
+      - master
+      - develop
+  pull_request:
+  workflow_dispatch:
+
+env:
+  REGISTRY_IMAGE: l1drm/yumechi-no-kuni
+  TAGS: |
+    type=edge
+    type=ref,event=pr
+    type=ref,event=branch
+    type=semver,pattern={{version}}
+    type=semver,pattern={{major}}.{{minor}}
+    type=semver,pattern={{major}}
+
+jobs:
+  # see https://docs.docker.com/build/ci/github-actions/multi-platform/#distribute-build-across-multiple-runners
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+    steps:
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+      - name: Check out the repo
+        uses: actions/checkout@v4.1.1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+          tags: ${{ env.TAGS }}
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Build and Push to Docker Hub
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: ${{ matrix.platform }}
+          provenance: true
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1