chore: convert cron to htpasswd 4-workflow pattern

Standardise cron workflow: hadolint → test → build-push.
Keep original nightly schedule (0 0 * * *) and nightly+sha tag metadata.

.gitea/workflows/cron.yaml

@@ -5,29 +5,44 @@ on:
     - cron: '0 0 * * *'
 
 jobs:
-  rebuild:
+  hadolint:
+    runs-on: ubuntu-latest
+    continue-on-error: true
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - uses: hadolint/hadolint-action@2332a7b74a6de0dae2221d5762e62ba76ba5e5 # v3.3.0
+        with:
+          dockerfile: Dockerfile
+
+  test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5
-      - name: Login to Docker Hub
-        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - uses: docker/setup-buildx-action@d7f5e7f509e45cec57ec56a6c5c6518a8f3d5f5 # v4
+      - run: docker build -t ci-image:${{ github.sha }} .
+      - run: bash tests/test.sh ci-image:${{ github.sha }}
+
+  build-push:
+    needs: [test]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
+      - uses: docker/setup-buildx-action@d7f5e7f509e45cec57ec56a6c5c6518a8f3d5f5 # v4
+      - uses: docker/login-action@650006c6eb7dba73a995cc03b0a2d7f5ca915bee # v4
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      - name: Docker metadata
-        id: meta
-        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9
+      - id: meta
+        uses: docker/metadata-action@80c7e94dd9b9319bd5e1e20e6f2e5e12a2a2e9 # v6
         with:
           images: jcabillot/dl
           tags: |
             type=raw,value=nightly
             type=sha
-      - name: Build and push
-        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf
+      - uses: docker/build-push-action@f9f3042f7e27895886610d7f5c8f03e5195baf # v7.2.0
         with:
           context: .
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          pull: true