Debian PHP 8.3

Custom Docker image based on Debian stable slim, with PHP Sury apt repo, and the following PHP 8.3 packages:

• php8.3-cli
• php8.3-common
• php8.3-curl
• php8.3-imagick
• php8.3-intl
• php8.3-mbstring
• php8.3-opcache
• php8.3-readline
• php8.3-xml
• php8.3-zip