Alexey Hog

location /socket/ {
    proxy_pass http://127.0.0.1:8443;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_read_timeout 70s;
}

location / {
    try_files $uri /index.php?$args&url=$uri;
}

location / {
    rewrite ^/question/([0-9]+)/answer/([0-9]+)/$ /question/$1#answer-$2 permanent;
    ...
}