adds missing ssl package

script/install/ubuntu1604.sh

@@ -28,7 +28,7 @@ curl -sL https://www.rabbitmq.com/rabbitmq-release-signing-key.asc | apt-key add
 add-apt-repository 'deb http://www.rabbitmq.com/debian/ testing main'
 apt update
 export DEBIAN_FRONTEND=noninteractive
-apt install -y ruby2.3 ruby2.3-dev build-essential mariadb-server libmysqlclient-dev rabbitmq-server nodejs git nginx wget nano
+apt install -y ruby2.3 ruby2.3-dev build-essential libssl-dev mariadb-server libmysqlclient-dev rabbitmq-server nodejs git nginx wget nano
 gem install bundler procodile --no-rdoc --no-ri
 
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