feat: add lint, build, test, push pipeline with SHA-pinned actions

- Split single build job into 4 jobs: lint, build, test, push
- SHA-pin all actions for supply chain security
- Use ChristopherHX artifact actions (Gitea-compatible)
- Add tests/test.sh with Docker bridge gateway networking
- Test GET / returns jQuery File Upload HTML

.gitea/workflows/docker-build.yaml

@@ -9,38 +9,74 @@ on:
     - cron: '0 0 * * *'
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6
+
+      - name: Hadolint
+        uses: hadolint/hadolint-action@54c9adbab1582c2ef04b2016b760714a4bfde3cf  # v3.1.0
+        with:
+          dockerfile: Dockerfile
+
   build:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v4
+      - name: Build image
+        run: docker build -t ci-image:${{ github.sha }} .
+
+      - name: Save image
+        run: docker save -o image.tar ci-image:${{ github.sha }}
+
+      - name: Upload artifact
+        uses: https://github.com/ChristopherHX/gitea-upload-artifact@62ac910c5d3dfa85c7cb2df15afe2e342b2407c2  # main
+        with:
+          name: docker-image
+          path: image.tar
+          retention-days: 1
+
+  test:
+    runs-on: ubuntu-latest
+    needs: [lint, build]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10  # v6
+
+      - name: Download artifact
+        uses: https://github.com/ChristopherHX/gitea-download-artifact@75635f32b4c1c41c4b3d64e8f85210112ed4c9c7  # main
+        with:
+          name: docker-image
+
+      - name: Load image
+        run: docker load < image.tar
+
+      - name: Run tests
+        run: bash tests/test.sh ci-image:${{ github.sha }}
+
+  push:
+    runs-on: ubuntu-latest
+    needs: test
+    if: github.event_name != 'pull_request'
+    steps:
+      - name: Download artifact
+        uses: https://github.com/ChristopherHX/gitea-download-artifact@75635f32b4c1c41c4b3d64e8f85210112ed4c9c7  # main
+        with:
+          name: docker-image
+
+      - name: Load image
+        run: docker load < image.tar
 
       - name: Login to Docker Hub
-        if: github.event_name != 'pull_request'
-        uses: docker/login-action@v4
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee  # v4
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Docker metadata
-        id: meta
-        uses: docker/metadata-action@v6
-        with:
-          images: jcabillot/dl
-          tags: |
-            #type=ref,event=branch
-            #type=ref,event=pr
-            #type=sha
-            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/master' }}
-
-      - name: Build and push
-        uses: docker/build-push-action@v7
-        with:
-          context: .
-          push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.meta.outputs.tags }}
-          labels: ${{ steps.meta.outputs.labels }}
-          pull: true
+      - name: Tag and push
+        run: |
+          docker tag ci-image:${{ github.sha }} jcabillot/dl:latest
+          docker push jcabillot/dl:latest