refactor(infra) : reorganize docker config into infra/dev and infra/prod

Align project structure with Lesstime: move docker/ to infra/dev/ and
deploy/ to infra/prod/. Update all references in docker-compose,
makefile, CI workflow, Dockerfile, .gitignore and .dockerignore.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

infra/dev/xdebug.ini

@@ -0,0 +1,9 @@
+zend_extension = /usr/local/lib/php/extensions/no-debug-non-zts-20240924/xdebug.so
+xdebug.mode=debug
+xdebug.idekey=PHPSTORM
+xdebug.start_with_request=yes
+xdebug.discover_client_host=1
+xdebug.client_port=9003
+xdebug.log="/var/www/html/LOG/xdebug.log"
+xdebug.log_level=0
+xdebug.connect_timeout_ms=2