ci: implement action for building Docker image

Author: ABGEO

.github/workflows/docker-publish.yml

@@ -0,0 +1,150 @@
+name: Docker
+
+on:
+  push:
+    branches: [ "main", "ci/implement-docker-action" ]
+    tags: [ 'v*.*.*' ]
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME_PREFIX: ${{ github.repository }}
+
+jobs:
+  detect-affected:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          ref: main
+
+      - name: Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.7
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+          cache: "pnpm"
+
+      - name: Setup GoLang
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: "go.work"
+
+      - name: Install dependencies
+        run: pnpm install --frozen-lockfile
+
+      - name: Get affected projects
+        id: get-affected
+        run: |
+          set -euo pipefail
+
+          AFFECTED_PROJECTS=$(npx nx show projects --affected --projects "apps/*" --json)
+
+          echo "affected_projects=$AFFECTED_PROJECTS" >> $GITHUB_OUTPUT
+
+      - name: Set matrix
+        id: set-matrix
+        run: |
+          set -euo pipefail
+
+          cat > docker-config.json << EOL
+          {
+            "ui": {
+              "dockerfile": "apps/ui/Dockerfile",
+              "context": "."
+            },
+            "api": {
+              "dockerfile": "apps/api/build/package/Dockerfile",
+              "context": "."
+            }
+          }
+          EOL
+
+          AFFECTED_PROJECTS='${{ steps.get-affected.outputs.affected_projects }}'
+          MATRIX=$(echo $AFFECTED_PROJECTS | jq -c --slurpfile config docker-config.json '
+            . as $projects |
+            $config[0] as $dockerConfigs |
+            {
+              project: $projects | map(select(. as $p | $dockerConfigs[$p] != null)) | map({
+                name: .,
+                dockerfile: $dockerConfigs[.].dockerfile,
+                context: $dockerConfigs[.].context
+              })
+            }
+          ')
+
+          echo "matrix=$MATRIX" >> $GITHUB_OUTPUT
+
+  build-docker:
+    needs: detect-affected
+    if: ${{ needs.detect-affected.outputs.matrix != '{"project":[]}' }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix: ${{ fromJson(needs.detect-affected.outputs.matrix) }}
+      fail-fast: false
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install cosign
+        if: github.event_name != 'pull_request'
+        uses: sigstore/cosign-installer@v3
+        with:
+          cosign-release: 'v2.2.4'
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME_PREFIX }}-${{ matrix.project.name }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=sha
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+
+      - name: Build and push Docker image
+        id: build-and-push
+        uses: docker/build-push-action@v6
+        with:
+          context: ${{ matrix.project.context }}
+          file: ${{ matrix.project.dockerfile }}
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Sign the published Docker image
+        if: ${{ github.event_name != 'pull_request' }}
+        env:
+          TAGS: ${{ steps.meta.outputs.tags }}
+          DIGEST: ${{ steps.build-and-push.outputs.digest }}
+        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}