Respond to feedback on hardcoded Makefile values

[Copilot]

Reviewer flagged hardcoded githubRepoUrl and githubUserName values in Makefile deployment target.

Responded to the request to create an issue explaining that:

• Cannot create GitHub issues directly due to environment constraints
• Offered to either fix the issue inline or provide documentation for manual issue creation

Proposed fix would align with existing pattern:

# Current (hardcoded)
--set-string gitappCallback.githubRepoUrl=https://github.com/calypr/registrations-test \
--set-string gitappCallback.githubUserName=bwalsh \

# Proposed (environment variables)
--set-string gitappCallback.githubRepoUrl="${GITAPP_CALLBACK_REPO_URL}" \
--set-string gitappCallback.githubUserName="${GITAPP_CALLBACK_USER_NAME}" \

Awaiting direction on preferred approach.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[bwalsh]

done