use this method

.gitea/workflows/dockerfile_testing_runner.yaml

@@ -22,9 +22,6 @@ jobs:
       - name: List files in the repository
         run: |
           ls ${{ gitea.workspace }}
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Compute next version
         id: versioning
         run: |
@@ -43,19 +40,21 @@ jobs:
           username: ${{ secrets.USERNAME_GITEA }}
           password: ${{ secrets.PASSWORD_GITEA }}
 
-      - name: Build and push
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          file: infra/testing/dockerfile
-          push: true
-          build-args: |
-            ALLOWED_HOSTS='django-testing.tryton.geeraert.eu'
-            DEBUG='True'
-            CACHE_BUST=${{ env.next_version }}
-          tags: |
-            gitea.tryton.geeraert.eu/pi-ux-ce/django-testing:latest
-            gitea.tryton.geeraert.eu/pi-ux-ce/django-testing:${{ env.next_version }}
+      - name: Build image
+        run: |
+          docker build \
+            -f infra/testing/dockerfile \
+            --build-arg ALLOWED_HOSTS='django-testing.tryton.geeraert.eu' \
+            --build-arg DEBUG='True' \
+            --build-arg CACHE_BUST=${{ env.next_version }} \
+            -t gitea.tryton.geeraert.eu/pi-ux-ce/django-testing:latest \
+            -t gitea.tryton.geeraert.eu/pi-ux-ce/django-testing:${{ env.next_version }} \
+            .
+
+      - name: Push image
+        run: |
+          docker push gitea.tryton.geeraert.eu/pi-ux-ce/django-testing:latest
+          docker push gitea.tryton.geeraert.eu/pi-ux-ce/django-testing:${{ env.next_version }}
 
       - name: update version in the variable
         run: |