Define that file router is better to be placed after regular router i…

.github/CONTRIBUTING.md

@@ -19,5 +19,5 @@ Since Yii 3 consists of many packages, we have a [special development tool](http
 If you don't have any particular package in mind to start with:
 
 - [Check roadmap](https://github.com/yiisoft/docs/blob/master/003-roadmap.md).
-- Check package issues at github. Usually there are some.
+- Check package issues at GitHub. Usually there are some.
 - Ask @samdark.

.github/SECURITY.md

@@ -3,4 +3,4 @@
 Please use the [security issue form](https://www.yiiframework.com/security) to report to us any security issue you
 find in Yii. DO NOT use the issue tracker or discuss it in the public forum as it will cause more damage than help.
 
-Please note that as a non-commercial OpenSource project we are not able to pay bounties at the moment.
+Please note that as a non-commercial OpenSource project, we are not able to pay bounties at the moment.

README.md

@@ -37,6 +37,7 @@ composer require yiisoft/file-router
     return [
         'middlewares' => [
             // ...
+            Router::class,
             \Yiisoft\FileRouter\FileRouter::class,
             // or
             [
@@ -49,7 +50,10 @@ composer require yiisoft/file-router
     ];
     ```
 
-2. [Configure the router](docs/guide/en#configuration) for your needs.
+2. [Configure the file router](docs/guide/en#configuration) for your needs.
+
+> Note: `FileRouter` goes after regular `Router` to serve as a fallback in case explicitly defined route
+  is not found.
 
 By default, the following structure of the app could be used assuming `App` points to `src` directory:
 

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "yiisoft/file-router",
     "type": "library",
-    "description": "File based router",
+    "description": "Convention-based file structure router",
     "keywords": [
         "file-router",
         "router",

config/web.php

@@ -9,7 +9,7 @@
 use Yiisoft\Middleware\Dispatcher\MiddlewareFactory;
 
 return [
-    FileRouter::class => function (ContainerInterface $container) {
+    FileRouter::class => static function (ContainerInterface $container) {
         $eventDispatcher = $container->has(EventDispatcherInterface::class)
             ? $container->get(EventDispatcherInterface::class)
             : null;