Add env to disable indexer supervisor

apps/indexer/config/config.exs

@@ -41,6 +41,8 @@ config :indexer,
 # config :indexer, Indexer.Fetcher.BlockReward.Supervisor, disabled?: true
 config :indexer, Indexer.Fetcher.StakingPools.Supervisor, disabled?: true
 
+config :indexer, Indexer.Supervisor, enabled: System.get_env("DISABLE_INDEXER") != "true"
+
 config :indexer, Indexer.Tracer,
   service: :indexer,
   adapter: SpandexDatadog.Adapter,

apps/indexer/lib/indexer/application.ex

@@ -17,11 +17,17 @@ defmodule Indexer.Application do
 
     memory_monitor_name = Memory.Monitor
 
-    children = [
-      {Memory.Monitor, [memory_monitor_options, [name: memory_monitor_name]]},
-      {Indexer.Supervisor, [%{memory_monitor: memory_monitor_name}]}
+    base_children = [
+      {Memory.Monitor, [memory_monitor_options, [name: memory_monitor_name]]}
     ]
 
+    children =
+      if Application.get_env(:indexer, Indexer.Supervisor)[:enabled] do
+        Enum.reverse([{Indexer.Supervisor, [%{memory_monitor: memory_monitor_name}]} | base_children])
+      else
+        base_children
+      end
+
     opts = [
       # If the `Memory.Monitor` dies, it needs all the `Shrinkable`s to re-register, so restart them.
       strategy: :rest_for_one,