edit Dockerfile etc

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+    "java.configuration.updateBuildConfiguration": "interactive"
+}

Dockerfile

@@ -1,11 +1,11 @@
-FROM maven:3-jdk-8-alpine as builder
+FROM maven:3-jdk-21-alpine AS builder
 
 WORKDIR /usr/src/app
 
 COPY . /usr/src/app
-RUN mvn package
+RUN mvn compile
 
-FROM openjdk:8-jre-alpine
+FROM openjdk:21-jre-alpine
 
 COPY --from=builder /usr/src/app/target/*.jar /app.jar
 

pom.xml

@@ -22,7 +22,6 @@
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<java.version>21</java.version>
-	        <server.port>8083</server.port>
 	</properties>
 
 	<dependencies>

src/main/java/com/example/demo/DemoApplication.java

@@ -8,11 +8,10 @@ import org.springframework.web.bind.annotation.*;
 @RestController
 public class DemoApplication {
 
-
-//test
+	//test
 	@GetMapping("/")
 	public String home() {
-		return "Spring is here!";
+		return "Spring is here!!!";
 	}
 
 	public static void main(String[] args) {