Fiddling around with this project for work, The TutorialController.java @PostMapping createTutorial function contains a logic bug.
TutorialController.java, Line 66-67 will always force the published bool to be false:
Tutorial _tutorial = tutorialRepository
.save(new Tutorial(tutorial.getTitle(), tutorial.getDescription(), false));

This in my opinion should be updated to:
Tutorial _tutorial = tutorialRepository.save(new Tutorial
(tutorial.getTitle(), tutorial.getDescription(), tutorial.isPublished()));

For big datasets this will corrupt your "published" boolean column and will result in one having to manually run SQL commands to update your dataset should you choose to hook it to a localdb.

The TCP/IP connection to the host localhost, port 1433 has failed. Error: "connect timed out. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".