Update Dockerfile

Dockerfile

 ARG DOCKER_REGISTRY=registry.cyberbrain.pw
-FROM $DOCKER_REGISTRY/tools/docker/curl/main:latest
+
+ARG CURL_IMAGE=tools/docker/curl/main
+ARG CURL_TAG=latest
+
+FROM $DOCKER_REGISTRY/$CURL_IMAGE:$CURL_TAG AS runtime
 
 USER root
 
@@ -12,3 +16,5 @@ RUN set -ex && \
 COPY "entrypoint.sh" "/entrypoint.sh"
 
 USER curl_user
+
+FROM runtime AS release