Add PHP support for calendar and IMAP to ns8-webserver

[stephdl]

Add support for calendar and IMAP to the ns8-webserver module. Currently, our php-fpm containers are based on both Debian trixie and bullseye, but the latest trixie version breaks the IMAP build. Switching to bookworm may be the best approach to resolve this issue.

php imap and calendar are required by web application (wordpress and dolibarr for examples)

Proposed solution

• Move the container build base from trixie to bookworm to ensure IMAP support is maintained.
• As an enhancement, update the Dockerfile to automatically test after the build that the PHP module (and all running dependencies) are correctly installed.

Alternative solutions

• Attempt to patch trixie’s build for imap, but this adds maintenance burden.
• do not use php imap as it is obsolete but some web application require it (Dolibarr)

Additional context

Ensuring PHP modules and dependencies are validated post-build will improve reliability and reduce deployment issues for ns8-webserver

See also

https://community.nethserver.org/t/activate-php-calendar-and-imap-extension/26456

[stephdl]

QA

Target is 1.1.5-dev.2

• What’s new in this version
  Added Calendar and IMAP support for PHP (IMAP build migrated from Trixie to Bookworm)
  Updated to a new minor PHP version
  Added new build-time tests to verify that the expected PHP modules are present and working correctly at runtime

• Direct installation test
  Install the module from the testing repository.
  Create a virtual host with PHP for each PHP version, applying specific PHP settings (e.g., memory limit, max post size, uploaded file size, etc.).
  For each PHP version, enter the container and run php -m — both calendar and imap modules should now be listed.
  No issues are expected.
  Deploy a PHP info page and verify that the configured PHP settings are correctly applied.
  Check the logs — no errors should appear.

• Upgrade test
  Install the module from the stable repository.
  Create a virtual host with PHP for each PHP version, applying specific PHP settings (as above).
  Upgrade to the testing version.
  For each PHP version, enter the container and run php -m — both calendar and imap modules should now be present.
  No issues are expected.
  Deploy a PHP info page to confirm that the PHP settings remain correctly applied.
  Check the logs — no errors should appear.

[mrmarkuz]

Test case "Direct installation" verified

Test case "Upgrade" verified