add --push so the images actually get published for nginx since they are not saved locally

Makefile

@@ -15,7 +15,7 @@ amd64_ffmpeg:
 	docker build --tag blakeblackshear/frigate-ffmpeg:1.1.0-amd64 --file docker/Dockerfile.ffmpeg.amd64 .
 
 nginx_frigate:
-	docker buildx build --platform linux/arm/v7,linux/arm64/v8,linux/amd64 --tag blakeblackshear/frigate-nginx:1.0.0 --file docker/Dockerfile.nginx .
+	docker buildx build --push --platform linux/arm/v7,linux/arm64/v8,linux/amd64 --tag blakeblackshear/frigate-nginx:1.0.0 --file docker/Dockerfile.nginx .
 
 amd64_frigate: version web
 	docker build --tag frigate-base --build-arg ARCH=amd64 --build-arg FFMPEG_VERSION=1.1.0 --build-arg WHEELS_VERSION=1.0.3 --build-arg NGINX_VERSION=1.0.0 --file docker/Dockerfile.base .