http://www.codetweet.com/nginx/solved-504-gateway-timeout-error-in-nginx-web-server/ https://rtcamp.com/tutorials/nginx/tweaking-fastcgi-buffers/
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To be used locally for development: server { listen 80; server_name magento.dev; root /usr/share/nginx/html/magento.dev; access_log /var/log/nginx/$host.access.log main;