If you follow the documentation here:
Nginx - EspoCRM Documentation
https://docs.espocrm.com/administration/nginx-server-configuration/


You will get everything working except icons since this line:

location /client {
root /path-to-espo; # path to espocrm root dir
autoindex off;

location ~* ^.+.(js|css|png|jpg|jpeg|gif|ico|tpl)$ {
access_log off;
expires max;
}
}

should also include: eot|svg|ttf|woff|woff2