less verbose crawler logging

backend/lib/backend/crawler/crawler.ex

@@ -32,7 +32,7 @@ defmodule Backend.Crawler do
         }
 
   def run(domain) do
-    Logger.info("Crawling #{domain}...")
+    Logger.debug("Starting crawl of #{domain}")
     HTTPoison.start()
 
     state = %Crawler{

backend/lib/backend/crawler/stale_instance_manager.ex

@@ -16,6 +16,8 @@ defmodule Backend.Crawler.StaleInstanceManager do
 
   @impl true
   def init(_opts) do
+    Logger.info("Starting crawler manager...")
+
     instance_count =
       Instance
       |> where([i], not is_nil(i.version))