Fix configuration

Author: ream88

README.md

@@ -20,6 +20,8 @@ end
 config :logger, :console,
   format: {LoggerBinary.Formatter, :format},
   metadata: [:direction]
+
+config :logger, LoggerBinary.Formatter, format: "[$level] $message\n"
 ```
 
 ## Features

config/config.exs

@@ -3,3 +3,5 @@ import Config
 config :logger, :console,
   format: {LoggerBinary.Formatter, :format},
   metadata: [:direction]
+
+config :logger, LoggerBinary.Formatter, format: "[$level] $message\n"

lib/logger_binary/formatter.ex

@@ -2,7 +2,7 @@ defmodule LoggerBinary.Formatter do
   @moduledoc false
 
   @default_format Logger.Formatter.compile(
-                    Application.compile_env(:config, [:console, :format], "[$level] $message\n")
+                    Application.compile_env(:logger, [__MODULE__, :format], "[$level] $message\n")
                   )
 
   def format(level, message, timestamp, metadata) when is_binary(message) do