Compress images to improve download/upload speed (#1932)

Author: mathbunnyru

.github/actions/load-image/action.yml

@@ -21,9 +21,6 @@ runs:
         path: /tmp/jupyter/images/
     - name: Load downloaded image to docker 📥
       run: |
-        docker load --input /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar
+        zstd --uncompress --stdout --rm /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar.zst | docker load
         docker image ls --all
       shell: bash
-    - name: Delete the file 🗑️
-      run: rm /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar
-      shell: bash

.github/workflows/docker-build-test-upload.yml

@@ -96,11 +96,11 @@ jobs:
       - name: Save image as a tar for later use 💾
         run: |
           mkdir -p /tmp/jupyter/images/
-          docker save ${{ env.OWNER }}/${{ inputs.image }} -o /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar
+          docker save ${{ env.OWNER }}/${{ inputs.image }} | zstd > /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar.zst
         shell: bash
       - name: Upload image as artifact 💾
         uses: actions/upload-artifact@v3
         with:
           name: ${{ inputs.image }}-${{ inputs.platform }}
-          path: /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar
+          path: /tmp/jupyter/images/${{ inputs.image }}-${{ inputs.platform }}.tar.zst
           retention-days: 3