first try

.github/workflows/build-and-push.yml

@@ -0,0 +1,38 @@
+name: Build and push Docker image
+on: push
+jobs:
+  docker:
+    #if: github.ref == 'refs/heads/master'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - name: install poetry
+        run: pip install poetry
+      - name: Check for pyproject.toml update
+        id: check-for-update
+        run: |
+          if git diff HEAD~ pyproject.toml | grep -P '\+version = "(v\d+\.\d+)"'; then
+            echo version=$(git diff HEAD~ pyproject.toml | grep -P '\+version = "(v\d+\.\d+)"' | grep -oP 'v\d+\.\d+') >> "$GITHUB_OUTPUT"
+          else
+            echo "skip" >> $GITHUB_OUTPUT
+      - name: Set up QEMU
+        if: steps.id.check-for-update.output.version != skip
+        uses: docker/setup-qemu-action@v3
+      - name: Set up Docker Buildx
+        if: steps.id.check-for-update.output.version != skip
+        uses: docker/setup-buildx-action@v3
+      #- name: Login to Docker Hub
+      #  if: steps.id.check-for-update.output.version != skip
+      #  uses: docker/login-action@v3
+      #  with:
+      #    username: ${{ secrets.DOCKERHUB_USERNAME }}
+      #    password: ${{ secrets.DOCKERHUB_TOKEN }}
+      #- name: Build and push
+      #  if: steps.id.check-for-update.output.version != skip
+      #  uses: docker/build-push-action@v6
+      #  with:
+      #    push: true
+      #    tags: user/app:latest