ci: Reuse workflow for docker

.github/workflows/docker.yml

@@ -7,32 +7,4 @@ on:
       - completed
 jobs:
   docker:
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      # https://github.com/docker/login-action#github-container-registry
-      - uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-      # https://github.com/docker/setup-buildx-action#usage
-      - uses: docker/setup-buildx-action@v3
-      # https://github.com/docker/build-push-action#usage
-      - uses: docker/build-push-action@v6
-        with:
-          push: true
-          file: Dockerfile_django
-          tags: |
-            ghcr.io/${{ github.repository }}-django:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-      - uses: docker/build-push-action@v6
-        with:
-          push: true
-          file: Dockerfile_static
-          tags: |
-            ghcr.io/${{ github.repository }}-static:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+    uses: open-contracting/.github/.github/workflows/docker-django.yml@main