Meteor angular 2 project slow initial load time

We have a project with angular2 and meteor stack .
The problem is projects main js file 7e7e1892579e41b9db1fde7c7e9076615ab806be.js?meteor_js_resource=true is 564 kb and this is gzipped.
Because app depends on this file page loads very slow and after that it takes 3-4 seconds to load dom .

So , what can we do to make js file smaller and make websites initial loading faster.
İt takes 6-7 seconds to load .
you can look at here :

Thank you.