Add json view to DTOs.

pom.xml

@@ -48,6 +48,11 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-annotations -->
+		<dependency>
+		    <groupId>com.fasterxml.jackson.core</groupId>
+		    <artifactId>jackson-annotations</artifactId>
+		</dependency>
 		<!-- https://mvnrepository.com/artifact/org.mindrot/jbcrypt -->
 		<dependency>
 		    <groupId>org.mindrot</groupId>