Nginx configs to read about later for static files

nginx.log

# This block will catch static file requests, such as images, css, js
# The ?: prefix is a 'non-capturing' mark, meaning we do not require
# the pattern to be captured into $1 which should help improve performance
location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
    # Some basic cache-control for static files to be sent to the browser
    expires max;

    # Does the same as Cache-Control: public
    add_header Pragma public;

    # what are the latter two? o_O
    add_header Cache-Control "public, must-revalidate, proxy-revalidate";

    # what is this?
    add_header Vary Accept-Encoding;

    access_log off;
}

# Must do these
location = /robots.txt  { access_log off; log_not_found off; }
location = /favicon.ico { access_log off; log_not_found off; }