Docker PHP-FPM 7.4 & nginx on Alpine Linux

Example PHP-FPM 7.4 & nginx setup for Google Cloud Run, build on Alpine Linux.

Details

Follows the KISS principle (Keep It Simple, Stupid) to make it easy to understand and adjust the image to your needs
WIP: meant to be used with Firebase: there's a build step to compile required PHP extensions
Single file nginx config:
- default alpine config with a single default host listening on port 8080 (Cloud Run default)
- host configuration based on Laravel example
- errors logged to STDERR with warn level, built-in logging is overriden
- access log is off (Cloud Run logs access on its own)
- root directory is /run/code/public
- realip module configured for Cloud Run
- upload size configured in one place for both nginx and PHP (100M)
- fastcgi_buffering is off
PHP-FPM pool configuration:
- listens through UNIX socket
- WIP: static process management
Services supervision with runit:
- nginx service won't start before PHP-FPM socket exists