fx-monitor/config/logback-spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
  <appender name="JSON" class="ch.qos.logback.core.ConsoleAppender">
    <encoder class="net.logstash.logback.encoder.LogstashEncoder">
      <includeContext>true</includeContext>
    </encoder>
  </appender>

  <appender name="ASYNC_JSON" class="ch.qos.logback.classic.AsyncAppender">
    <appender-ref ref="JSON" />
  </appender>

  <root level="INFO">
    <appender-ref ref="ASYNC_JSON" />
  </root>
</configuration>