Spring Boot your Hello World app will not "start"

add this to dependencies

```xml
<dependency>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-web</artifactId>
</dependency>
```

=================================

Spring Boot – Cannot determine embedded database driver class for database type NONE

`@EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})`
or
add `spring.datasource.url=jdbc:mysql://localhost/Test_DB` to `application.properties`