Add YamlListApplication class

spring-boot-modules/spring-boot-properties-2/src/main/java/com/baeldung/properties/yamllist/YamlListApplication.java

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