Fix the Docker verify step running build.sh instead of bash

The Dockerfile sets ENTRYPOINT ["/opt/neuros/build.sh"], so
`docker run neuros-build bash -c '...'` passed 'bash -c ...' to build.sh as
arguments. build.sh then attempted a real ISO build inside the container and
died on 'sudo: command not found', failing the job every time.

Pass --entrypoint bash so the verification actually runs. Also drops the
`|| echo "Docker build skipped"` on the build step: it turned a broken
Dockerfile into a confusing downstream failure instead of reporting itself.
Verified locally — the image builds and reports Python 3.12.3 and 78 tools.

Author: erichanwang

.github/workflows/ci.yml

@@ -105,16 +105,12 @@ jobs:
         uses: docker/setup-buildx-action@v3
 
       - name: Build Docker image
-        run: docker build -t neuros-build . 2>&1 || echo "Docker build skipped (non-critical in CI)"
+        run: docker build -t neuros-build .
 
-      - name: Verify Docker image (if built)
+      - name: Verify Docker image
         run: |
-          if docker image inspect neuros-build >/dev/null 2>&1; then
-            docker run --rm neuros-build bash -c "
-              echo 'Container verified:'
-              python3 --version 2>&1 || echo 'Python: not found'
-              echo 'NeurOS tools:' \$(find /usr/local/bin -name 'neuros-*' 2>/dev/null | wc -l)
-            "
-          else
-            echo "Docker image not built — check Dockerfile"
-          fi
+          docker run --rm --entrypoint bash neuros-build -c "
+            echo 'Container verified:'
+            python3 --version
+            echo 'NeurOS tools:' \$(find /usr/local/bin -name 'neuros-*' | wc -l)
+          "