The Confluence has some capabilities for JIRA issue report generation, but it's too generic to be usable. We've already created pages at:
Instead I propose to generate a CHANGELOG.md file for each module (including In-Portal itself) with all changes listed in format described at http://keepachangelog.com/.
To make this possible I've created "Change Log Message" and "Change Log Group" custom fields for each JIRA issue, that just needs to be filled-in. Next step would be to create some PHP script, that would use JIRA REST API to extract and sort that information as needed from JIRA. Then we can include resulting file In-Portal installation.