Trying to keep act-images

Dockerfile

@@ -1,5 +1,7 @@
 FROM public.ecr.aws/docker/library/alpine:3.21
 
+LABEL ACT_IMAGE=true
+
 RUN apk add --no-cache docker-cli-buildx bash
 
 WORKDIR /usr/src

entrypoint.sh

@@ -56,7 +56,7 @@ echo "Running docker buildx with options: ${DOCKER_BUILD_OPTIONS[@]}"
 echo "Building and pushing !"
 docker buildx build "${DOCKER_BUILD_OPTIONS[@]}"
 echo "Cleaning up docker"
-docker system prune --all --force
+docker system prune --all --force --filter label!=ACT_IMAGE=true
 
 echo "imageName=${IMAGE_NAME}" >> "$GITEA_OUTPUT"