throw error precision

docker/php/Dockerfile

@@ -24,7 +24,7 @@ RUN sed 's/main$/main universe/' -i /etc/apt/sources.list; \
     ## COMPOSER
     php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"; \
     php -r "if (hash_file('sha384', 'composer-setup.php') === '$COMPOSER_HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"; \
-    php composer-setup.php --1; \
+    php composer-setup.php; \
     php -r "unlink('composer-setup.php');"; \
     mv composer.phar /usr/local/bin/composer; \
     ## GIT, NANO, ACL, PROPCS, LIBZIP, IMAGICK