docs: Update the standalone nginx config
docs: Update the standalone nginx config

Remove the server { } part. Leaving just what you would insert into an
existing server stanza and update it to reflect the example paths
mentioned in the INSTALL document.

Signed-off-by: Andrew Clayton <02e0a999c50b1f88df7a8f5a04e1b76b35ea6a88@digital-domain.net>

ac000/receiptomatic