Lab 3 caveat

In Lab 3, under the section "Creating a sample application," when you go to https://start.spring.io/, be certain to select Java 8 (it defaulted to Java 11, for me). I also selected Spring Boot version 2.1.16, the oldest available, since that was the version shown in the video. If you don't, like I did the first time, the Java compilation will fail with errors. If you use Java 8 and Spring Boot 2.1.16, it works just like the video.