added healthcheck setting to instance config

config/config.exs

@@ -230,7 +230,8 @@
   welcome_user_nickname: nil,
   welcome_message: nil,
   max_report_comment_size: 1000,
-  safe_dm_mentions: false
+  safe_dm_mentions: false,
+  healthcheck: false
 
 config :pleroma, :markup,
   # XXX - unfortunately, inline images must be enabled by default right now, because

docs/config.md

@@ -103,6 +103,7 @@ config :pleroma, Pleroma.Emails.Mailer,
 * `welcome_user_nickname`: The nickname of the local user that sends the welcome message.
 * `max_report_comment_size`: The maximum size of the report comment (Default: `1000`)
 * `safe_dm_mentions`: If set to true, only mentions at the beginning of a post will be used to address people in direct messages. This is to prevent accidental mentioning of people when talking about them (e.g. "@friend hey i really don't like @enemy"). (Default: `false`)
+* `healthcheck`: if set to true, system data will be shown on ``/api/pleroma/healthcheck``.
 
 ## :logger
 * `backends`: `:console` is used to send logs to stdout, `{ExSyslogger, :ex_syslogger}` to log to syslog, and `Quack.Logger` to log to Slack

lib/pleroma/web/twitter_api/controllers/util_controller.ex

@@ -365,10 +365,15 @@ def captcha(conn, _params) do
   end
 
   def healthcheck(conn, _params) do
-    info = Pleroma.Healthcheck.system_info()
+    info =
+      if Pleroma.Config.get([:instance, :healthcheck]) do
+        Pleroma.Healthcheck.system_info()
+      else
+        %{}
+      end
 
     conn =
-      if info.healthy do
+      if info[:healthy] do
         conn
       else
         Plug.Conn.put_status(conn, :service_unavailable)