docs: add alternative solution for TLS/SSL issues using symbolic link

[NaufalAns]

This pull request updates the documentation to include an alternative solution for resolving TLS/SSL issues with static binaries. The added method involves creating a symbolic link from /etc/ssl to the root directory, which simplifies the process of pointing OpenSSL to the required certificates.

I have successfully tested this approach and found it to be the easiest and most straightforward method compared to the other solutions described in the documentation.

[crazywhalecc]

I recently did some research between static-php and different distributions, maybe it is a better and permanent(maybe) solution to directly specify --openssldir=/etc/ssl when static-php builds static openssl.

Doing this will allow PHP to detect and use the same configuration and certificates as your system, and it should be hard to find an OS missing root certificates in 2024.

This path currently works well on common distributions such as CentOS, Ubuntu, Debian, Alpine, etc., and adding it upstream should solve most OpenSSL problems, including frankenphp.

Some edge cases, such as special customized or stripped distributions, do not have it, but AFAIK, even the minimal Docker Alpine uses this path. We can still modify it through the configuration file for those cases.