ci(docker): run the image tests against the built image

build-and-push-image builds the image and pushes it to the local registry; pull
it into the daemon and run `pnpm test:docker` against it
(VIVLIOSTYLE_CLI_IMAGE=localhost:5000/vivliostyle/cli:latest) so the suite gates
CI instead of only being runnable locally.

Author: u1f992

.github/workflows/test.yml

@@ -108,3 +108,14 @@ jobs:
       - name: Inspect
         run: |
           docker buildx imagetools inspect localhost:5000/vivliostyle/cli:latest
+      - name: Pull the built image into the Docker daemon
+        run: docker pull localhost:5000/vivliostyle/cli:latest
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .nvmrc
+          cache: pnpm
+      - run: pnpm install
+      - name: Run the image tests
+        run: pnpm test:docker
+        env:
+          VIVLIOSTYLE_CLI_IMAGE: localhost:5000/vivliostyle/cli:latest