Pull-Through Caching Registry on Docker for Mac

Now I’m using this, which works:

{
  "insecure-registries" : [
    "http://127.0.0.1:5000"
  ],
  "debug" : true,
  "experimental" : true,
  "registry-mirrors" : [
    "http://127.0.0.1:5000"
  ]
}