Add comment bot to report Docker image package versions (#290)

* Add comment bot to report Docker image package versions

* Update integration-test.yml

.github/workflows/integration-test.yml

@@ -22,6 +22,7 @@ on:
 permissions:
   id-token: write
   contents: read
+  pull-requests: write  # Required for Sandbox image packages comment bot
 
 jobs:
   integration-test:
@@ -56,6 +57,31 @@ jobs:
           cd ./dea-sandbox/integration-testing
           CURRENT_UID=1000:100 docker-compose up -d
 
+      - name: Extract package versions
+        run: |
+          cd ./dea-sandbox/integration-testing
+          docker-compose exec -T sandbox cat /tmp/requirements.txt > requirements.txt
+
+      - name: Read package versions
+        id: versions
+        run: |
+          {
+            echo 'content<<EOF'
+            cat ./dea-sandbox/integration-testing/requirements.txt
+            echo EOF
+          } >> "$GITHUB_OUTPUT"
+
+      # Post package versions as a comment on the PR
+      - name: Post package versions as a comment
+        uses: mshick/add-pr-comment@v2
+        if: github.event_name == 'pull_request'
+        with:
+          message: |
+            ### Installed packages:
+            ```
+            ${{ steps.versions.outputs.content }}
+            ```
+
       - name: Set up Datacube and Test
         run: |
           cd ./dea-sandbox/integration-testing

docker/Dockerfile

@@ -51,7 +51,7 @@ RUN echo "Enable server extensions" \
 COPY assets/sync_repo assets/jupyterhub-singleuser /usr/local/bin/
 COPY assets/overrides.json /env/share/jupyter/lab/settings/
 
-RUN pip list --format=freeze 
+RUN pip list --format=freeze > /tmp/requirements.txt
 
 WORKDIR "/home/$nb_user"
 ENTRYPOINT ["/env/bin/tini", "--"]