deb https://nginx.org/packages/ubuntu/ focal nginx
deb-src https://nginx.org/packages/ubuntu/ focal nginx

# sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ABF5BD827BD9BF62
# sudo apt-key export ABF5BD827BD9BF62 | sudo gpg --dearmour -o /etc/apt/trusted.gpg.d/nginx.gpg