Faster image builds with caching (#4491)

* fix makefile variable

* add branch for testing

* fix arm32 build

* use amd64 for web build

* install wheels in a separate layer for better parallel builds

* try build-push-action

* try using gh context

* use short sha

* cleanup

.github/workflows/ci.yml

@@ -26,7 +26,15 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-      - name: Build image
-        run: make push
-        env:
-          IMAGE_REPO: ghcr.io/${{ github.actor }}/frigate
+      - name: Create short sha
+        run: echo "SHORT_SHA=${GITHUB_SHA::7}" >> $GITHUB_ENV
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64,linux/arm/v7
+          tags: |
+            ghcr.io/blakeblackshear/frigate:${{ github.ref_name }}-${{ env.SHORT_SHA }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max