Added a HttpCodeStatusMapper impl.

spring-boot-modules/spring-boot-actuator/src/main/java/com/baeldung/health/CustomStatusCodeMapper.java

@@ -0,0 +1,26 @@
+package com.baeldung.health;
+
+import org.springframework.boot.actuate.health.HttpCodeStatusMapper;
+import org.springframework.boot.actuate.health.Status;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CustomStatusCodeMapper implements HttpCodeStatusMapper {
+
+    @Override
+    public int getStatusCode(Status status) {
+        if (status == Status.DOWN) {
+            return 500;
+        }
+
+        if (status == Status.OUT_OF_SERVICE) {
+            return 503;
+        }
+
+        if (status == Status.UNKNOWN) {
+            return 500;
+        }
+
+        return 200;
+    }
+}