Update README.txt

[lukapaunovic]

Description

Recent versions of WebP Express require an instance-specific hash parameter
when using WebP On Demand on NGINX.

Apache (.htaccess) rules include this automatically, but NGINX users must pass
the hash explicitly. If the hash is missing, NGINX may serve
webp-on-demand.php as a static file instead of executing it, resulting in a
PHP file download and errors such as:

Configuration file was not found (wod-options.<hash>.json)

This pull request updates the documentation to clearly explain the requirement,
documents where to find the hash, and adds a working NGINX configuration example
using an internal rewrite (rewrite ... last) to ensure proper PHP execution
on NGINX + PHP-FPM setups (including Plesk).

[lukapaunovic]

@rosell-dk I edited the wrong file, i forgot to edit .md should I do it?

[rosell-dk]

I'll do it

[lukapaunovic]

#623 done

[rosell-dk]

I have created a new release which provides a notification to Nginx users that uses rewrite rules

[lukapaunovic]

Can you confirm is it correct to use try files first and then if it doesn't work to use internal rewrite?
Is there any downside of using internal rewrite?
Try files was working with nginx additional directives in plesk. But after hash i tried adding hash but it only worked with internal rewrite.
It could be that reasons is PHP fpm and fastcgi.
That parameter can't be passed by try files but I'm not sure. What are your thoughts?