Create .htaccess file in the application root folder.
RewriteEngine On
RewriteCond %{REQUEST_URI} !^web
RewriteRule ^(.*)$ web/$1 [L]
Also create .htaccess file in the /web/ folder:
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php