Docker throws error about jessie-backports not having a release file

[mikealeonetti]

When I run docker-compose build I get the following error:

Running hooks in /etc/ca-certificates/update.d...
done.
Removing intermediate container 33607d947ea1
 ---> 9ce50bf458ee
Step 6/21 : RUN echo 'deb http://deb.debian.org/debian jessie-backports main' > /etc/apt/sources.list.d/jessie-backports.list
 ---> Running in 9b0e374a5316
Removing intermediate container 9b0e374a5316
 ---> e356a67938d7
Step 7/21 : RUN apt-get update -y
 ---> Running in 97c00456d9d7
Hit:1 http://deb.debian.org/debian buster InRelease
Hit:2 http://deb.debian.org/debian buster-updates InRelease
Ign:3 http://deb.debian.org/debian jessie-backports InRelease
Err:4 http://deb.debian.org/debian jessie-backports Release
  404  Not Found [IP: 199.232.36.204 80]
Hit:5 http://security.debian.org/debian-security buster/updates InRelease
Reading package lists...
E: The repository 'http://deb.debian.org/debian jessie-backports Release' does not have a Release file.
ERROR: Service 'pjsip' failed to build: The command '/bin/sh -c apt-get update -y' returned a non-zero code: 100