fix: ensure bin/console is always executable (#100)

Dockerfile

@@ -92,7 +92,8 @@ RUN set -eux; \
 	composer install --prefer-dist --no-dev --no-progress --no-scripts --no-interaction; \
 	composer dump-autoload --classmap-authoritative --no-dev; \
 	composer symfony:dump-env prod; \
-	composer run-script --no-dev post-install-cmd; sync
+	composer run-script --no-dev post-install-cmd; \
+	chmod +x bin/console; sync
 VOLUME /srv/app/var
 
 COPY docker/php/docker-healthcheck.sh /usr/local/bin/docker-healthcheck