Merge pull request #54 from Ardenexal/claude/create-composer-lock-OMTlo

fix: add zip extension to Dockerfile for Composer dist downloads

Composer requires the zip extension to download packages from dist.
Without it the install fails with "zip extension and unzip/7z commands
are both missing" and falls back to git which is also absent.

https://claude.ai/code/session_016uoaNn7tWACKwy6BgpDaRF

Author: Ardenexal

demo/Dockerfile

@@ -2,7 +2,7 @@ FROM dunglas/frankenphp:1-php8.5-bookworm
 
 # Install extensions not already present in the base image
 # (dom, xml, xmlwriter, xmlreader, simplexml, mbstring, ctype, iconv are pre-installed)
-RUN install-php-extensions bcmath intl opcache
+RUN install-php-extensions bcmath intl opcache zip
 
 COPY --from=composer:latest /usr/bin/composer /usr/bin/composer