Book's Upgrade: Migrating from Spring Boot 2.6 to 2.7

A new upgrade chapter! This one covers the required changes on the book���s source code to update it to Spring Boot 2.7.1 and some extras.

Table of Contents An H2 major upgrade surprise and some extras Migrate to Spring Boot 2.7 Major H2 upgrade Feature not supported: ���AUTO_SERVER=TRUE && DB_CLOSE_ON_EXIT=FALSE��� Error executing DDL ���create table user ������ Bonus: Migrating bootstrap to application���s properties Remove the legacy bootstrap st...