feat(LogbookConfig): use logbook's json formatter as sink

Took 41 seconds

src/main/java/dev/kons/kuenyawz/configurations/LogbookConfig.java

@@ -0,0 +1,27 @@
+package dev.kons.kuenyawz.configurations;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.zalando.logbook.HttpLogFormatter;
+import org.zalando.logbook.Sink;
+import org.zalando.logbook.json.JsonHttpLogFormatter;
+import org.zalando.logbook.logstash.LogstashLogbackSink;
+
+/**
+ * Configures the logstash to properly format the logbook logs.
+ * Without this, the JSON logs will escape the double quotes and unable
+ * to be parsed.
+ * <br><br>
+ * <a href="https://www.udemy.com/course/spring-framework-6-beginner-to-guru/learn/lecture/44051012">
+ *     <b>Udemy Reference</b></a>
+ */
+@Configuration
+public class LogbookConfig {
+
+	@Bean
+	public Sink logbookLogStash() {
+		HttpLogFormatter formatter = new JsonHttpLogFormatter();
+		LogstashLogbackSink sink = new LogstashLogbackSink(formatter);
+		return sink;
+	}
+}