restore composer install

.gitlab-ci.yml

@@ -4,7 +4,11 @@ stages:
 before_script:
   - apt-get -yqq update
   - apt-get -yqq install zip unzip
-  - curl -sS https://composer.github.io/installer | php
+  - curl -sS https://composer.github.io/installer.sig > installer.sig
+  - php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+  - php -r "if (hash_file('SHA384', 'composer-setup.php') === file_get_contents('installer.sig')) { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
+  - php composer-setup.php
+  - php -r "unlink('composer-setup.php'); unlink('installer.sig');"
 
 cache:
   paths: