disabling Telemetry did not help the Docker build

lib/labelmaker_web/endpoint.ex

@@ -38,7 +38,7 @@ defmodule LabelmakerWeb.Endpoint do
     cookie_key: "request_logger"
 
   plug Plug.RequestId
-  # plug Plug.Telemetry, event_prefix: [:phoenix, :endpoint]
+  plug Plug.Telemetry, event_prefix: [:phoenix, :endpoint]
 
   plug Plug.Parsers,
     parsers: [:urlencoded, :multipart, :json],

lib/labelmaker_web/router.ex

@@ -27,18 +27,18 @@ defmodule LabelmakerWeb.Router do
   # end
 
   # Enable LiveDashboard in development
-  # if Application.compile_env(:labelmaker, :dev_routes) do
-  #   # If you want to use the LiveDashboard in production, you should put
-  #   # it behind authentication and allow only admins to access it.
-  #   # If your application does not have an admins-only section yet,
-  #   # you can use Plug.BasicAuth to set up some basic authentication
-  #   # as long as you are also using SSL (which you should anyway).
-  #   import Phoenix.LiveDashboard.Router
-  #
-  #   scope "/dev" do
-  #     pipe_through :browser
-  #
-  #     live_dashboard "/dashboard", metrics: LabelmakerWeb.Telemetry
-  #   end
-  # end
+  if Application.compile_env(:labelmaker, :dev_routes) do
+    # If you want to use the LiveDashboard in production, you should put
+    # it behind authentication and allow only admins to access it.
+    # If your application does not have an admins-only section yet,
+    # you can use Plug.BasicAuth to set up some basic authentication
+    # as long as you are also using SSL (which you should anyway).
+    import Phoenix.LiveDashboard.Router
+
+    scope "/dev" do
+      pipe_through :browser
+
+      live_dashboard "/dashboard", metrics: LabelmakerWeb.Telemetry
+    end
+  end
 end