Этот прокси можно использовать, если вы получаете ошибку
Error response from daemon: pull access denied for nginx, repository does not exist or may
require 'docker login': denied: 403 Forbidden Since Docker is a US company,
we must comply with US export control regulations. In an effort to comply with these, we now block
all IP addresses that are located in Cuba, Iran, North Korea, Republic of Crimea, Sudan, and Syria.
If you are not in one of these cities, countries, or regions and are blocked,
please reach out to https://hub.docker.com/support/contact/