JAVA-6350: Add comments for SpringDoc v2 compatible with Spring Boot 3 (#13989)

spring-boot-modules/spring-boot-springdoc-2/src/test/java/com/baeldung/springdoc/SpringContextTest.java

@@ -0,0 +1,17 @@
+package com.baeldung.springdoc;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit.jupiter.SpringExtension;
+
+@ExtendWith(SpringExtension.class)
+@SpringBootTest
+class SpringContextTest {
+
+    @Test
+    void whenSpringContextIsBootstrapped_thenNoExceptions() {
+
+    }
+
+}

spring-boot-modules/spring-boot-springdoc-2/src/test/resources/logback-test.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration scan="true" scanPeriod="15 seconds" debug="false">
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>[%d{ISO8601}]-[%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="WARN">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>