fix: restore build-pull-request workflow

.github/workflows/build-pull-request.yml

@@ -0,0 +1,54 @@
+name: Build Pull Request
+
+on:
+  pull_request:
+    branches:
+      - '*'
+
+concurrency:
+   group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+   cancel-in-progress: true
+
+jobs:
+  build-container:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Define environment variables
+        run: |
+          echo REPOSITORY=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
+          echo TAG=$(echo "PR-${{ github.event.pull_request.number }}") >> $GITHUB_ENV
+
+      - name: Set up docker
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build container
+        uses: docker/build-push-action@v5
+        with:
+          tags: ghcr.io/${{ env.REPOSITORY }}:${{ env.TAG }}
+          outputs: type=docker,dest=/tmp/esi-opticks-${{ env.TAG }}.tar
+
+      - name: Save built image for test jobs
+        uses: actions/upload-artifact@v4
+        with:
+          name: esi-opticks-${{ env.TAG }}
+          path: /tmp/esi-opticks-${{ env.TAG }}.tar
+
+  test-container:
+    runs-on: ubuntu-latest
+    needs: build-container
+    steps:
+      - name: Define environment variables
+        run: |
+          echo REPOSITORY=$(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
+          echo TAG=$(echo "PR-${{ github.event.pull_request.number }}") >> $GITHUB_ENV
+
+      - name: Download artifact
+        uses: actions/download-artifact@v4
+        with:
+          name: esi-opticks-${{ env.TAG }}
+          path: /tmp
+
+      - name: Run tests
+        run: |
+          docker load --input /tmp/esi-opticks-${{ env.TAG }}.tar
+          docker run ghcr.io/${{ env.REPOSITORY }}:${{ env.TAG }} bash -l -c opticks-info