added contacts runit

runit/contacts-sharelatex.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+export SHARELATEX_CONFIG=/etc/sharelatex/settings.coffee
+exec /sbin/setuser www-data /usr/bin/node /var/www/sharelatex/contacts/app.js >> /var/log/sharelatex/contacts 2>&1