I got it.
Step 1.
Create an user on remote mysql server and grant all privileges.
Step 2.
Change datasource url
spring.datasource.url=jdbc:mysql://xxx.xxx.xxx.xxx:3306/dbtest
Step 3.
Change pom.xml mysql
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
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