feat: add hadolint

.github/workflows/lint.yml

@@ -0,0 +1,71 @@
+name: Lint Dockerfile
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    paths:
+      - "Dockerfile.template"
+
+jobs:
+  lint:
+    name: 'Lint Dockerfile (PHP: ${{ matrix.php-version }})'
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        php-version:
+          - '8.0'
+          - '8.1'
+          - '8.2'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Lint Dockerfile
+        id: hadolint
+        uses: hadolint/hadolint-action@master
+        with:
+          dockerfile: ./${{ matrix.php-version }}/Dockerfile
+
+      - name: Save hadolint results to artifact
+        if: failure()
+        run: echo "${{ steps.hadolint.outcome }}" > hadolint-${{ matrix.php-version }}.txt
+
+      - name: Upload artifact
+        if: failure()
+        uses: actions/upload-artifact@v2
+        with:
+          name: hadolint-results
+          path: hadolint-${{ matrix.php-version }}.txt
+
+  comment:
+    needs: lint
+    if: always()
+    runs-on: ubuntu-latest
+    steps:
+      - name: Download all artifacts
+        uses: actions/download-artifact@v2
+        with:
+          path: artifacts
+
+      - name: Combine outputs and create comment
+        if: github.event_name == 'pull_request'
+        uses: actions/github-script@v6
+        with:
+          script: |
+            const fs = require('fs');
+            const path = require('path');
+            const resultsDir = './artifacts/hadolint-results';
+            const files = fs.readdirSync(resultsDir);
+            let combinedOutput = '#### Hadolint Results:\n\n';
+            for (const file of files) {
+              const content = fs.readFileSync(path.join(resultsDir, file), 'utf8');
+              combinedOutput += `PHP Version: ${file.replace('hadolint-', '').replace('.txt', '')}:\n`;
+              combinedOutput += '```\n' + content + '\n```\n';
+            }
+            github.rest.issues.createComment({
+              issue_number: context.issue.number,
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              body: combinedOutput
+            })