PULL_REQUEST_TEMPLATE.md

Summary

Maintainability
Test Coverage
- [ ] I have run `rspec` and corrected all errors
- [ ] I have run `rubocop` and corrected all errors
- [ ] I have run `npm run test` and corrected all errors
- [ ] I have tested this change locally and tried to launch the server as well as access a project, and with that at least one build
- [ ] If there is an existing issue, make sure to add `Fixes ...` as part of the PR body to reference the issue you're solving