Change Dockerfile to Dockerfile.python to prepare more images

.gitea/workflows/docker.yaml

@@ -10,7 +10,7 @@ on:
     - cron: '15 14 * * 4'
 
 jobs:
-  docker:
+  Python-build:
     strategy:
       matrix:
         python-versions: [3.12, 3.11, "3.10"]
@@ -42,7 +42,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
-          file: ./Dockerfile
+          file: ./Dockerfile.python
           build-contexts: |
             alpine=docker-image://python:${{ matrix.python-versions }}-alpine
           tags: git.dryusdan.fr/${{ secrets.REPOSITORY_USER }}/build-alpine:${{ matrix.python-versions }}