SDPPE-41: Added configurable php-fpm slowlog timeout setting.

[aparador]

Motivation

The php-fpm request_slowlog_timeout option was not previously configured, by enabling this option

• Slow PHP requests can be logged and traced.
• These traces can be picked up by the php-fpm-exporter, which exposes them as Prometheus metrics.
• This helps developers and platform engineers detect performance issues and identify problematic code paths

Changes

• Added php-fpm.conf under images/php/ with [www] request_slowlog_timeout, slowlog as the contents.
• Updated Dockerfile.fpm to:
  • Copy php-fpm.conf into /usr/local/etc/php-fpm.d/
  • Add ONBUILD ARG and ONBUILD ENV for BAY_PHP_FPM_REQUEST_SLOWLOG_TIMEOUT
• Made the timeout value configurable using an environment variable.
• Maintained default value as 10s unless overridden.

Testing

1. Build image locally cd images/php and docker build -t test-php-fpm -f Dockerfile.fpm .

[nicksantamaria]

I think this is looking good @aparador ! The image for this branch was built, you can see it here - https://github.com/dpc-sdp/bay/pkgs/container/bay%2Fphp-fpm/470096179?tag=pr-367

Should be OK to get the testing steps underway now 👍

[nicksantamaria]

/build

[nicksantamaria]

/build

[nicksantamaria]

/build