23:08:48.538 [error] Could not check origen for Phoenix.Socket transport.

This happens when you are attempting a socket connection to
a different host than the one configured in your config/
files. For example, in development the host is configured
to "localhost" but you may be trying to access it from
"127.0.0.1". To fix this issue, you may either:

  1. update [url: [host: ...]] to your actual host in the
     config file for your current environment (recommended)

  2. pass the :check_origen option when configuring your
     endpoint or when configuring the transport in your
     UserSocket module, explicitly outlining which origens
     are allowed:

        check_origen: ["https://example.com",
                       "//another.com:888", "//other.com"]

docker pull battlesnake/battle_snake
docker run -it -p 3000:3000 battlesnake/battle_snake