promising solution using volume mount

.gitea/workflows/dockerfile_runner.yaml

@@ -44,7 +44,7 @@ jobs:
       - name: Cache Docker layers
         uses: actions/cache@v4
         with:
-          path: ${{ runner.temp }}/.buildx-cache
+          path: /opt/hostedtoolcache/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}
           restore-keys: |
             ${{ runner.os }}-buildx-
@@ -53,7 +53,7 @@ jobs:
       - name: inject cache into docker
         uses: reproducible-containers/buildkit-cache-dance@v3.1.0
         with:
-          cache-source: /root/.cache/pip
+          cache-source: /opt/hostedtoolcache/pip
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -72,8 +72,8 @@ jobs:
           tags: |
             gitea.tryton.geeraert.eu/pi-ux-ce/django-python:latest
             gitea.tryton.geeraert.eu/pi-ux-ce/django-python:${{ env.next_version }}
-          cache-from: type=local,src=${{ runner.temp }}/.buildx-cache
-          cache-to: type=local,dest=${{ runner.temp }}/.buildx-cache-new,mode=max
+          cache-from: type=local,src=/opt/hostedtoolcache/.buildx-cache
+          cache-to: type=local,dest=/opt/hostedtoolcache/.buildx-cache-new,mode=max
 
       - name: Rollout Django to force pulling the new image
         uses: actions-hub/kubectl@master