Fix endpoint port config in an umbrella application. (#6549)

* Correctly configure endpoint port in an umbrella application.

* Test for port config.

Author: khustochka

installer/templates/phx_umbrella/config/runtime.exs

@@ -7,7 +7,7 @@ import Config
 # any compile-time configuration in here, as it won't be applied.
 # The block below contains prod specific runtime configuration.
 
-config :<%= @app_name %>, <%= @endpoint_module %>,
+config :<%= @web_app_name %>, <%= @endpoint_module %>,
   http: [port: String.to_integer(System.get_env("PORT", "4000"))]
 
 if config_env() == :prod do

installer/test/phx_new_umbrella_test.exs

@@ -81,7 +81,12 @@ defmodule Mix.Tasks.Phx.New.UmbrellaTest do
         assert file =~ "port: 80"
       end)
 
-      assert_file(root_path(@app, "config/runtime.exs"), ~r/ip: {0, 0, 0, 0, 0, 0, 0, 0}/)
+      assert_file(root_path(@app, "config/runtime.exs"), fn file ->
+        assert file =~
+                 ~r/^\s+config :phx_umb_web, PhxUmbWeb.Endpoint,\n\s+http: \[port: String\.to_integer\(System\.get_env\("PORT", "4000"\)\)\]$/m
+
+        assert file =~ ~r/^\s+ip: {0, 0, 0, 0, 0, 0, 0, 0}$/m
+      end)
 
       assert_file(root_path(@app, ".formatter.exs"), fn file ->
         assert file =~ "plugins: [Phoenix.LiveView.HTMLFormatter]"