fix : resolve var/cache permission issue in Docker

Create var/cache and var/log directories in Dockerfile and ensure
correct ownership in Makefile before running composer install.

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

infra/dev/Dockerfile

@@ -81,7 +81,7 @@ RUN mkdir -p /var/www/.composer/cache/vcs \
 ENV COMPOSER_HOME=/var/www/.composer
 
 # Création de la structure du projet
-RUN mkdir /var/www/html/LOG
+RUN mkdir -p /var/www/html/LOG /var/www/html/var/cache /var/www/html/var/log
 
 ###> User ###
 ARG CURRENT_UID

makefile

@@ -44,6 +44,8 @@ install: copy-git-hook composer-install cache-clear node-use build-nuxtJS migrat
 reset: delete_built_dir remove_orphans build-without-cache start wait install
 
 composer-install:
+	$(EXEC_PHP_ROOT) mkdir -p /var/www/html/var/cache /var/www/html/var/log
+	$(EXEC_PHP_ROOT) chown -R www-data:www-data /var/www/html/var
 	$(EXEC_PHP) composer install
 	$(SYMFONY_CONSOLE) lexik:jwt:generate-keypair --skip-if-exists