Оптимизайка

You can't isolate one site from each other on the windows platform by apache. However, you can limit apache process from interacting with system folders by using separate user account. You can use IIS (embedded microsoft web server) to complete that task, but there are limits in non-server Windows versions.

Much less efforts are required to setup LAMP instead of securely configuring Windows.

There are no limits, but technically its limited to about 2^30 accounts :)

docker, php-fpm (container per site)

Does your server really have over 10G of memory?

А что, по-русски писать — это теперь немодно, или что?

Maybe 😂

Duplicate entry '(.+?)' for key '(.+?)'

I'm not arguing with you, and thank you for this example. It will be an argument for next communication iteration with Yandex Support Team 😂

It's multiple size icon containing both 16x16, 32x32, and 48x48 images, Btw, I've contacted Yandex Support Team about multiple size favicon too, and I cite answer from Yandex. My icon doesn't displayed nor in webmaster panel nor in search results.

Check your nginx configuration: nginx -T

Фома, no, Yandex can't use large icons:

load data infile 'models.txt' into table category(model). phpMyAdmin also has CSV file import feature.

Or, convert your data (with help of Excel, for example) into following sql operators and feed the list into phpMyAdmin:

insert into category(model) values('model_name_1');

insert into category(model) values('model_name_2');

...

insert into category(model) values('model_name_N');