dev: Create a Python package, build Docker images from it (#4551)

Co-authored-by: Kuchenpirat <24235032+Kuchenpirat@users.noreply.github.com>
Co-authored-by: Michael Genson <71845777+michael-genson@users.noreply.github.com>
Co-authored-by: Hayden <64056131+hay-kot@users.noreply.github.com>

.github/workflows/partial-builder.yml

@@ -16,7 +16,14 @@ on:
         required: true
 
 jobs:
+  build-package:
+    name: "Build Python package"
+    uses: ./.github/workflows/partial-package.yml
+    with:
+      tag: ${{ inputs.tag }}
+
   publish:
+    needs: build-package
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
@@ -35,18 +42,22 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Override __init__.py
-        run: |
-          echo "__version__ = \"${{ inputs.tag }}\"" > ./mealie/__init__.py
-
       - uses: depot/setup-action@v1
 
+      - name: Retrieve Python package
+        uses: actions/download-artifact@v4
+        with:
+          name: backend-dist
+          path: dist
+
       - name: Build and push Docker image, via Depot.dev
         uses: depot/build-push-action@v1
         with:
           project: srzjb6mhzm
           file: ./docker/Dockerfile
           context: .
+          build-contexts: |
+            packages=dist
           platforms: linux/amd64,linux/arm64
           push: true
           tags: |