cannot import in logstash about logstash-json HOT 3 CLOSED

docker run --rm -ti -p 5001:5001 logstash:2.3 logstash --debug -e 'input { tcp {codec => json port => "5001"} } output { stdout { } }'

use Mix.Config

config :logger,
  backends: [
    {LogstashJson.TCP, :logstash},
    {LogstashJson.Console, :json}
  ]

config :logger, :logstash,
  level: :debug,
  host: System.get_env("LOGSTASH_TCP_HOST") || "localhost",
  port: System.get_env("LOGSTASH_TCP_PORT") || "5001",
  fields: %{appid: "logstash-json"}

config :logger, :json,
  level: :info

Accepted connection {:client=>"172.17.0.1:59212", :server=>"0.0.0.0:5001", :level=>:debug, :file=>"logstash/inputs/tcp.rb", :line=>"142", :method=>"server_connection_thread"}
config LogStash::Codecs::JSONLines/@charset = "UTF-8" {:level=>:debug, :file=>"logstash/config/mixin.rb", :line=>"153", :method=>"config_init"}
config LogStash::Codecs::JSONLines/@delimiter = "\n" {:level=>:debug, :file=>"logstash/config/mixin.rb", :line=>"153", :method=>"config_init"}
Pushing flush onto pipeline {:level=>:debug, :file=>"logstash/pipeline.rb", :line=>"458", :method=>"flush"}

iex(2)> Logger.info "hi"
{"module":null,"metadata":null,"message":"hi","line":2,"level":"info","function":null,"@timestamp":"2016-09-19T20:54:39.213+02:00"}
:ok

filter received {:event=>{"module"=>nil, "metadata"=>[], "message"=>"hi", "line"=>2, "level"=>"info", "function"=>nil, "appid"=>"logstash-json", "@timestamp"=>"2016-09-19T18:54:39.213Z", "@version"=>"1", "host"=>"172.17.0.1", "port"=>59212}, :level=>:debug, :file=>"(eval)", :line=>"18", :method=>"filter_func"}
output received {:event=>{"module"=>nil, "metadata"=>[], "message"=>"hi", "line"=>2, "level"=>"info", "function"=>nil, "appid"=>"logstash-json", "@timestamp"=>"2016-09-19T18:54:39.213Z", "@version"=>"1", "host"=>"172.17.0.1", "port"=>59212}, :level=>:debug, :file=>"(eval)", :line=>"23", :method=>"output_func"}
2016-09-19T18:54:39.213Z 172.17.0.1 hi