dockerfile 6.3.3 doesn't build due some broken apt repo

[kortov]

I always get an error during buildng dockerfile

tep 53/90 : RUN apt-get update && apt-get install -y wget coreutils unzip mysql-client  && rm -rf /var/lib/apt/lists/*
 ---> Running in 010830bbe9c9
Ign http://deb.debian.org jessie InRelease
Get:1 http://deb.debian.org jessie-updates InRelease [16.3 kB]
Get:2 http://security.debian.org jessie/updates InRelease [44.9 kB]
Ign http://deb.debian.org jessie-backports InRelease
Get:3 http://deb.debian.org jessie Release.gpg [1652 B]
Ign http://deb.debian.org jessie-backports Release.gpg
Get:4 http://deb.debian.org jessie Release [77.3 kB]
Ign http://deb.debian.org jessie-backports Release
Err http://deb.debian.org jessie-backports/main amd64 Packages
  
Err http://deb.debian.org jessie-backports/main amd64 Packages
  
Err http://deb.debian.org jessie-backports/main amd64 Packages
  
Get:5 http://deb.debian.org jessie-updates/main amd64 Packages [20 B]
Err http://deb.debian.org jessie-backports/main amd64 Packages
  404  Not Found
Get:6 http://deb.debian.org jessie/main amd64 Packages [9098 kB]
Get:7 http://security.debian.org jessie/updates/main amd64 Packages [886 kB]
W: There is no public key available for the following key IDs:
AA8E81B4331F7F50
W: Failed to fetch http://deb.debian.org/debian/dists/jessie-backports/main/binary-amd64/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.
Fetched 10.1 MB in 1min 44s (97.1 kB/s)
ERROR: Service 'knowage' failed to build: The command '/bin/sh -c apt-get update && apt-get install -y wget coreutils unzip mysql-client  && rm -rf /var/lib/apt/lists/*' returned a non-zero code: 100

I guess this stfo answer explains the problem
And I used this stfo answer

And I ended up with this code

RUN echo "deb [check-valid-until=no] http://cdn-fastly.deb.debian.org/debian jessie main" > /etc/apt/sources.list.d/jessie.list
RUN echo "deb [check-valid-until=no] http://archive.debian.org/debian jessie-backports main" > /etc/apt/sources.list.d/jessie-backports.list
RUN sed -i '/deb http:\/\/deb.debian.org\/debian jessie-updates main/d' /etc/apt/sources.list

#install required packages and clean up to save space
RUN apt-get -o Acquire::Check-Valid-Until=false update && apt-get install -y wget coreutils unzip mysql-client  && rm -rf /var/lib/apt/lists/*

instead of RUN apt-get -o Acquire::Check-Valid-Until=false update && apt-get install -y wget coreutils unzip mysql-client && rm -rf /var/lib/apt/lists/*

I don't know the right solution for it, just popped the problem