Configuration behavior and inconsistency in Create Post API documentation

[dora11729]

Hi, thank you for sharing this project. I have a few questions while trying to run it:

1. I followed the steps in README.md, but the application could not run successfully at first.
   It seems that some settings in src/main/resources/application.properties are overridden by application.yml.
   After I modified the datasource url, username, and password in application.yml to match those in application.properties, the application started successfully.
   Is this the expected behavior?

2. In the "Create new post" API example, the request body only includes title and body.
   However, when I send the request following the example, the response indicates that categoryId is required.
   Should categoryId be included in the request, or is the example outdated?

Thanks in advance for your help.

[github-actions]

Welcome @dora11729 to Spring-Boot-Blog-REST-API community! Thanks so much for creating your first issue :)