On boot script 2x container fails to run

[Firstyear]

Describe the bug
on-boot-script-2.x contains a dockerfile to provide an environment to allow building the package. This dockerfile fails to operate, failing with:

14.72 Reading package lists...
14.74 W: The repository 'http://deb.debian.org/debian stretch Release' does not have a Release file.
14.74 W: The repository 'http://deb.debian.org/debian stretch-updates Release' does not have a Release file.
14.74 W: The repository 'http://deb.debian.org/debian stretch-backports Release' does not have a Release file.
14.74 W: The repository 'http://security.debian.org/debian-security stretch/updates Release' does not have a Release file.
14.74 E: Failed to fetch http://deb.debian.org/debian/dists/stretch/main/binary-amd64/Packages 404 Not Found [IP: 151.101.98.132 80]
14.74 E: Failed to fetch http://deb.debian.org/debian/dists/stretch-updates/main/binary-amd64/Packages 404 Not Found [IP: 151.101.98.132 80]
14.74 E: Failed to fetch http://deb.debian.org/debian/dists/stretch-backports/main/binary-amd64/Packages 404 Not Found [IP: 151.101.98.132 80]
14.74 E: Failed to fetch http://security.debian.org/debian-security/dists/stretch/updates/main/binary-amd64/Packages 404 Not Found [IP: 151.101.2.132 80]
14.74 E: Some index files failed to download. They have been ignored, or old ones used instead.

To Reproduce
Steps to reproduce the behavior:

1. Git clone unifios-utilities
2. cd on-boot-script-2.x
3. docker build -f Dockerfile .
4. See error

Expected behavior
Dockerfile should build.