ops: load docker image from tarball

.gitea/workflows/ci.yml

@@ -67,6 +67,11 @@ jobs:
         with:
           path: /tmp/docker
           key: ${{ runner.os }}-docker-${{ steps.dockerfile-hash.outputs.hash }}
+      -
+        name: Load image
+        run: |
+          docker load --input /tmp/docker/${{ runner.os }}-builder-image.tar
+          docker image ls -a
       -
         name: Build library
         uses: https://github.com/addnab/docker-run-action@v3