Log into Docker Hub before pulling any Docker Images

We are less likely to hit rate limiting if we log into Docker Hub
before pulling images.

.github/workflows/build.yml

@@ -231,6 +231,13 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install --upgrade --requirement requirements-test.txt
+      # We are less likely to hit rate limiting if we log into Docker
+      # Hub before pulling images.
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          password: ${{ secrets.DOCKER_PASSWORD }}
+          username: ${{ secrets.DOCKER_USERNAME }}
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx