How to set up the cnc admin panel (backend)?

Question

Yii

I downloaded the .htaccess file data from the forum.
Now the admin panel is available at site.ru/admin , but on this page a 404 error pops up.
The main page of the admin panel looks like this site.ru/admin/site/index, How to configure the cnc so that there are no 404 errors

<IfModule mod_rewrite.c>
    Options +FollowSymlinks
    RewriteEngine On
</IfModule>
 
<IfModule mod_rewrite.c>
    # deal with admin first
    RewriteCond %{REQUEST_URI} ^/(admin)
    RewriteRule ^admin/assets/(.*)$ backend/web/assets/$1 [L]
    RewriteRule ^admin/css/(.*)$ backend/web/css/$1 [L]

    RewriteCond %{REQUEST_URI} !^/backend/web/(assets|css)/
    RewriteCond %{REQUEST_URI} ^/(admin)
    RewriteRule ^.*$ backend/web/index.php [L]

    RewriteCond %{REQUEST_URI} ^/(assets|css|js|images)
    RewriteRule ^assets/(.*)$ frontend/web/assets/$1 [L]
    RewriteRule ^css/(.*)$ frontend/web/css/$1 [L]
    RewriteRule ^js/(.*)$ frontend/web/js/$1 [L]
    RewriteRule ^images/(.*)$ frontend/web/images/$1 [L]
    RewriteRule ^(.*)$ frontend/web/$1 [L]

    RewriteCond %{REQUEST_URI} !^/(frontend|backend)/web/(assets|css|js)/
    RewriteCond %{REQUEST_URI} !index.php
    RewriteCond %{REQUEST_FILENAME} !-f [OR]
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^.*$ frontend/web/index.php
</IfModule> 

# Если это папка или файл, открываем его
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
# В противном случае перенаправляем на index.php
RewriteRule . index.php

'urlManager' => [
            'enablePrettyUrl' => true,
            'showScriptName' => false,
            //'suffix' => '.html',
            'rules' => [
                '' => 'site/index',
                
                
                '<action>'=>'site/<action>',
            ],
        ], 
         'assetManager' => [
             'basePath' => '@webroot/assets',
             'baseUrl' => '@web/assets'
        ],  
        'request' => [
            'baseUrl' => ''
        ]

Answer 1

instead of
doing
we are talking about backend/config?
Although I don't like this structure in general, I prefer the admin area on a subdomain. The framework files should be moved to a higher level than the public folder and htassess will not need to be edited.