install wget

Signed-off-by: Aidan Oldershaw <aoldershaw@pivotal.io>

pipelines/php-larvel-app-testing.yml

@@ -25,8 +25,10 @@ jobs:
             args:
               - -c
               - |
+                set -e
+
                 apt-get update
-                apt-get install -y git unzip
+                apt-get install -y git unzip wget
 
                 EXPECTED_CHECKSUM="$(wget -q -O - https://composer.github.io/installer.sig)"
                 php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"