Switch docker builds from running on GHA to Depot.dev. Tidy README.

.github/workflows/partial-builder.yml

@@ -18,6 +18,8 @@ on:
 jobs:
   publish:
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -35,19 +37,14 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
       - name: Override __init__.py
         run: |
           echo "__version__ = \"${{ inputs.tag }}\"" > ./mealie/__init__.py
 
-      - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+      - name: Build and push Docker image, via Depot.dev
+        uses: depot/build-push-action@v1
         with:
+          project: srzjb6mhzm
           file: ./docker/Dockerfile
           context: .
           platforms: linux/amd64,linux/arm64
@@ -58,6 +55,3 @@ jobs:
             ${{ inputs.tags }}
           build-args: |
             COMMIT=${{ github.sha }}
-          # https://docs.docker.com/build/ci/github-actions/cache/#github-cache
-          cache-from: type=gha
-          cache-to: type=gha,mode=max