I am a newbie in jira cloud and finally I found the right place for getting support.
View release information for an issue
If your administrator has connected Jira Software to a compatible release tool, a releases panel will be displayed on the View Issue screen.
For the moment I have no idea, how a Connect App could post data to the REST API endpoints.
I am looking for a tutorial that explains How or with what to post Build and Deployment data to jira.
Step1 from developer cloud jira getting-started is done.
Source code in glitch https://jira-release-panel.glitch.me/atlassian-connect.json