refactor: Update dockerfile and remove @ComponentScane

Author: jittagornp

spring-boot-reactive-change-server-port/README.md

@@ -48,7 +48,6 @@ pom.xml
 
 ``` java
 @SpringBootApplication
-@ComponentScan(basePackages = {"me.jittagornp"})
 public class AppStarter {
 
     public static void main(String[] args) {

spring-boot-reactive-change-server-port/src/main/java/me/jittagornp/example/reactive/AppStarter.java

@@ -5,13 +5,11 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.annotation.ComponentScan;
 
 /**
  * @author jitta
  */
 @SpringBootApplication
-@ComponentScan(basePackages = {"me.jittagornp"})
 public class AppStarter {
 
     public static void main(String[] args) {

spring-boot-reactive-dockerfile/Dockerfile

@@ -1,5 +1,5 @@
 # https://hub.docker.com/_/openjdk
-FROM openjdk:11-jre-slim
+FROM openjdk:21-slim
 EXPOSE 8080
 ADD target/*.jar /app.jar
 ENTRYPOINT java $JAVA_OPTS -jar /app.jar

spring-boot-reactive-dockerfile/README.md

@@ -55,7 +55,6 @@ pom.xml
 
 ``` java
 @SpringBootApplication
-@ComponentScan(basePackages = {"me.jittagornp"})
 public class AppStarter {
 
     public static void main(String[] args) {

spring-boot-reactive-dockerfile/src/main/java/me/jittagornp/example/reactive/AppStarter.java

@@ -5,13 +5,11 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.annotation.ComponentScan;
 
 /**
  * @author jitta
  */
 @SpringBootApplication
-@ComponentScan(basePackages = {"me.jittagornp"})
 public class AppStarter {
 
     public static void main(String[] args) {

spring-boot-reactive-helloworld/src/main/java/me/jittagornp/example/reactive/AppStarter.java

@@ -5,7 +5,6 @@
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
-import org.springframework.context.annotation.ComponentScan;
 
 /**
  * @author jitta