E: Some index files failed to download. They have been ignored, or old ones used instead.
[0mThe command '/bin/sh -c apt-get update && apt-get upgrade -y python-pip && pip install --upgrade pip && apt-get install -y cron bc' returned a non-zero code: 100
while making docker build apt-get update failed with below error
Err http://deb.debian.org/ jessie/main amd64 Packages 404 Not Found Err http://deb.debian.org/ jessie-updates/main amd64 Packages 404 Not Found [91mW: Failed to fetch http://security.debian.org/dists/jessie/updates/main/binary-amd64/Packages 404 Not Found [IP: 151.101.2.132 80]
W: Failed to fetch http://deb.debian.org/debian/dists/jessie/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead. [0mThe command '/bin/sh -c apt-get update && apt-get upgrade -y python-pip && pip install --upgrade pip && apt-get install -y cron bc' returned a non-zero code: 100