Improvement of Timezone Handling and Caddy Log Formatting

[K2ouMais]

Description:

It has been possible to set container timezones via the TZ environment variable without installing tzdata. To improve visibility and usability, I have explicitly added this ENV variable to all Dockerfiles and updated the documentation.

FrankenPHP & Caddy Logging:

Currently, the FrankenPHP images (using Caddy) output logs in UTC by default, which can complicate debugging. I have adjusted the Caddy configuration to:

1. Respect the timezone set via the TZ variable in log outputs.
2. Introduce a new variable, CADDY_LOG_DATETIME_FORMAT, allowing for custom timestamp formats supported by Caddy.

Backward Compatibility:

These changes are fully backward compatible. Default values are in place, ensuring that if TZ or CADDY_LOG_DATETIME_FORMAT are not set, the behavior remains exactly as it is now.

Examples

docker-compose.yml

services:
  app:
    image: serversideup/php:8.5-frankenphp
    environment:
      TZ: Europe/Berlin
      CADDY_LOG_DATETIME_FORMAT: "wall"
...

Running directly in your terminal:

docker run --rm -it \
  -e TZ=Europe/Berlin \
  -e CADDY_LOG_DATETIME_FORMAT=wall \
  serversideup/php:8.5-frankenphp

[K2ouMais]

Please take a look at the following file:

https://github.com/serversideup/docker-php/blob/main/src/variations/frankenphp/etc/frankenphp/log-level/global/debug.caddyfile

There is on line one the word "debug". I just let it the way it was and didnt find any reference in the caddy logs for that.
It could be a possible bug?