<appender name="rollingFile" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOG_DIR}/app.log</file>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <Pattern>%d{yyyy-MM-dd HH:mm:ss} [%thread] %-5level %logger{36} - %msg%n</Pattern>
        </encoder>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>app.%d{yyyyMMdd-HHmm}</fileNamePattern>
            <maxHistory>15</maxHistory>
        </rollingPolicy>
    </appender>