unify docker image build test and push

.github/workflows/build_docker_images.yml

@@ -1,6 +1,9 @@
-name: Build Docker images (nightly)
+name: Test, build, and push Docker images
 
 on:
+  pull_request: # During PRs, we just check if the changes Dockerfiles can be successfully built
+    paths:
+      - "docker/**"
   workflow_dispatch:
   schedule:
     - cron: "0 0 * * *" # every day at midnight
@@ -14,9 +17,40 @@ env:
   CI_SLACK_CHANNEL: ${{ secrets.CI_DOCKER_CHANNEL }}
 
 jobs:
-  build-docker-images:
+  test-build-docker-images:
     runs-on: ubuntu-latest
+    if: github.event_name == 'pull_request'
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      - name: Check out code
+        uses: actions/checkout@v3
+      - name: Get changed files
+        id: changed-files
+        uses: tj-actions/changed-files@3f54ebb830831fc121d3263c1857cfbdc310cdb9 #v42
+        with:
+          files: docker/**
+      - name: Run step if only the files listed above change
+        if: steps.changed-files.outputs.only_changed == 'true'
+        env:
+          CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files}}
+        run: |
+          for file in ${CHANGED_FILES}; do
+            echo "$file was changed"
+          done
+      - name: Build Docker images
+        strategy:
+          matrix:
+            docker-file: ${{ steps.changed-files.outputs.all_changed_files}}
+        uses: docker/build-push-action@v4
+        with:
+          context: ${{ matrix.docker-file }}
+          push: False
 
+  build-and-push-docker-images:
+    runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request'
+
     permissions:
       contents: read
       packages: write

docker/diffusers-pytorch-cpu/Dockerfile

@@ -40,6 +40,7 @@ RUN python3 -m pip install --no-cache-dir --upgrade pip uv==0.1.11 && \
         numpy \
         scipy \
         tensorboard \
-        transformers
+        transformers \
+        pandas
 
 CMD ["/bin/bash"]