Fix Timezone Handling for Containers

[LSI-ZuagrastaWastl]

This PR standardizes timezone handling across all MISP Docker containers.

The timezone can now be set optionally via the TZ environment variable.
If defined, it is applied globally and consistently across all containers and all processes, including system services, supervisord, background jobs, logs, and the MISP web interface.

If TZ is not set, the default remains UTC.

Changes

• Added TZ as environment variable with default UTC
• Mounted /usr/share/zoneinfo/${TZ:-UTC} to /etc/localtime
• Configured PHP (tzone.ini) to use date.timezone from TZ

Benefits

• Consistent timezone across system, logs, workers, and web interface
• Optional but globally enforced configuration
• More portable Docker setup
• Non-breaking change

Best Regards from Bayern-CERT

[ostefano]

Could you move this to a separate file and edit Dockerfile to COPY it at build time and run sed in there (like we do with the PHP files?

Your solution is much cleaner, but not everybody is using docker-compose.yml.

[LSI-ZuagrastaWastl]

In fact, I had primarily focused on the fact that when using docker-compose.yml, you have the option of setting the time zone everywhere. And as far as I can see, configs: must therefore remain in docker-compose.yml for the PHP-Settings.

As far as I can see, for the build-time is the timezone setting via ${PHP_TIMEZONE}.

misp-docker/core/files/entrypoint_fpm.sh

Line 50 in b12a20c

sed -i "s/;?date.timezone = .*/date.timezone = ${PHP_TIMEZONE}/" "$FILE"

Therefore, in my opinion, no additional file would be necessary.
However, this variable has no effect on a finished image via docker-Compose.yml.

I could imagine that you could ensure that either ${PHP_TIMEZONE} or ${TZ:-UTC} is used. This means you only have to set it once in .env in example like this
sed -i "s/;?date.timezone = .*/date.timezone = ${PHP_TIMEZONE:-${TZ:-UTC}}/" "$FILE"

And probably here

misp-docker/core/Dockerfile

Line 116 in b12a20c

ENV TZ=Etc/UTC

would be better ENV TZ= ${TZ:-UTC}.

What do you think about it @ostefano ?