Enabling CiviVolunteer 2.0 Volunteer Opportunity Listing
There's a link under the Volunteer menu "Search for Volunteer Opportunities" that you can copy to a menu option or a button:

http://address-to-your-site/civicrm/vol/#/volunteer/opportunities

You also need to make sure that the permission "CiviVolunteer: register to volunteer" is granted for the Anonymous role if they're not going to be logged in (or another role if they are).

There's some additional information at
http://civicrm.github.io/org.civicrm.volunteer/docs/

Note that Angular Profiles should be installed an an extension in the CiviCRM extensions directory and then enabled.