Provide metrics on root URL

lib/kafkaex_lag_exporter.ex

@@ -1,32 +1,13 @@
 defmodule KafkaexLagExporter do
-
   @moduledoc """
-  Supervisor to start the '__consumer__offsets' watcher child
+  KafkaexLagExporter keeps the contexts that define your domain
+  and business logic.
+
+  Contexts are also responsible for managing your data, regardless
+  if it comes from the database, an external API or others.
   """
 
-  use Application
-
-  def start(_type, _args) do
-    import Supervisor.Spec
-
-    consumer_group_opts = [
-      # setting for the ConsumerGroup
-      heartbeat_interval: 1_000,
-      # this setting will be forwarded to the GenConsumer
-      commit_interval: 1_000
-    ]
-
-    gen_consumer_impl = ConsumerOffsetsGenConsumer
-    consumer_group_name = "offsets_group"
-    topic_names = ["__consumer_offsets"]
-
-    children = [
-      supervisor(
-        KafkaEx.ConsumerGroup,
-        [gen_consumer_impl, consumer_group_name, topic_names, consumer_group_opts]
-      )
-    ]
-
-    Supervisor.start_link(children, strategy: :one_for_one)
+  def hello() do
+    :world
   end
 end