bugfix(container-builder) Use the mnt space instead of root space for docker images

Author: heathen711

.github/workflows/build-container.yml

@@ -43,21 +43,17 @@ jobs:
       # PLATFORMS: 'linux/amd64,linux/arm64'
       PLATFORMS: 'linux/amd64'
     steps:
-      - name: Free up more disk space on the runner
-        # https://github.com/actions/runner-images/issues/2840#issuecomment-1284059930
-        run: |
-          echo "----- Free space before cleanup"
-          df -h
-          sudo rm -rf /usr/share/dotnet
-          sudo rm -rf "$AGENT_TOOLSDIRECTORY"
-          sudo swapoff /mnt/swapfile
-          sudo rm -rf /mnt/swapfile
-          echo "----- Free space after cleanup"
-          df -h
-
       - name: Checkout
         uses: actions/checkout@v4
 
+      # the /mnt dir has 70GBs of free space
+      # /dev/sda1        74G   28K   70G   1% /mnt
+      - name: Configure Docker to use the larger mnt directory
+        run: |
+          sudo chmod -R 777 /mnt
+          echo '{"data-root": "/mnt/docker-root"}' | sudo tee /etc/docker/daemon.json
+          sudo systemctl restart docker
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v5