Fixes

[cappuc]

• removed already installed extensions
• removed excimer (it cause segfault with frankenphp)
• reduced JIT buffer size (can cause segfault when too big)

[Copilot]

Pull request overview

This PR optimizes the PHP Docker image by removing redundant extension installations and fixing a compatibility issue with FrankenPHP. The changes reduce image build time and prevent potential runtime segfaults.

Changes:

• Removed built-in PHP extensions (iconv, pdo_sqlite, phar, posix, simplexml, sodium) from the installation list as they are already included in PHP core
• Removed excimer extension due to segfault issues with FrankenPHP variant
• Reduced JIT buffer size from 100M to 32M to prevent potential segfaults under high memory pressure
• Fixed indentation in nginx configuration conditional block

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