BAEL-54445 reorganize docker modules

docker-modules/docker-images/src/main/java/com/baeldung/docker/MainApplication.java

@@ -0,0 +1,13 @@
+package com.baeldung.docker;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MainApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(MainApplication .class, args);
+    }
+
+}

docker-modules/docker-images/src/main/java/com/baeldung/docker/controllers/HelloWorldController.java

@@ -0,0 +1,12 @@
+package com.baeldung.docker.controllers;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HelloWorldController {
+    @GetMapping("/helloworld")
+    String helloWorld() {
+        return "Hello World!";
+    }
+}

docker-modules/docker-images/src/main/resources/application.properties

@@ -0,0 +1 @@
+