ngx-php dockerfile need upgrade

[soulteary]

current issues:

nginx version in nginx:stable-alpine is nginx version: nginx/1.20.2, maybe we should provide an updated version to verify that the program builds and works correctly.

maybe the project maintainer can provide an official image, which can lower the threshold for users to use :D

[soulteary]

I've created pr #144

If authorized maintainers can submit a container image, it will be easier for users to use ngx-php in the future.

In the PR, I upgraded the Nginx version, as well as the PHP version

prebuilt for test: https://github.com/nginx-with-docker/ngx_http_php_module
demo: #142

[joanhey]

Ngx-php works perfectly with latest versions of PHP and nginx.

Nginx: 1.23.1 and PHP 8.1

[soulteary]

tips, in the alpine stable repository, without manual compilation, we will get the 8.0 version of PHP @joanhey

[joanhey]

I do it with debian.
https://github.com/TechEmpower/FrameworkBenchmarks/blob/master/frameworks/PHP/php-ngx/php-ngx-pgsql.dockerfile