I'm a bit disappointed that people are willing to make public criticisms of Docker when it's their builds that are failing. They made the decision to depend on

I'm a bit disappointed that people are willing to make public criticisms of Docker when it's their builds that are failing. They made the decision to depend on a resource that could be unavailable for a large number of reasons entirely unrelated to Docker or their infrastructure. Just like the node builds that failed this should cause you to rethink how you mirror or cache remote resources not prompt you to complain about your broken builds on a github issue page. There may be things you'll never be able to fully mirror or cache (or could just be entirely impractical) but an apt repository is definitely not one of them.