using apt-cache

Dockerfile

@@ -28,6 +28,8 @@ WORKDIR ${SALT_BUILD_DIR}
 
 # Install packages
 # hadolint ignore=DL3008
+RUN sed -i 's@deb.debian.org@apt-cache.service.nr5/deb.debian.org@g' /etc/apt/sources.list && \
+    sed -i 's@security.debian.org@apt-cache.service.nr5/security.debian.org@g' /etc/apt/sources.list
 RUN apt-get update \
  && DEBIAN_FRONTEND=noninteractive apt-get install --yes --quiet --no-install-recommends \
     sudo ca-certificates apt-transport-https wget locales openssh-client gpg gpg-agent \