Correct the artifactid and names to match with the folder following the guidelines

docker/docker-spring-boot/pom.xml

@@ -5,7 +5,7 @@
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <groupId>com.baeldung.docker</groupId>
-        <artifactId>docker-spring-boot-parent</artifactId>
+        <artifactId>docker</artifactId>
         <version>0.0.1</version>
     </parent>
 

docker/docker-spring-boot/src/main/java/com/baeldung/docker/spring/DemoApplication.java

@@ -1,4 +1,4 @@
-package com.baeldung.docker;
+package com.baeldung.docker.spring;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

docker/docker-spring-boot/src/main/java/com/baeldung/docker/spring/HelloController.java

@@ -1,4 +1,4 @@
-package com.baeldung.docker;
+package com.baeldung.docker.spring;
 
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.GetMapping;