environment specific log back config

logback.xml

<configuration>

    <if condition='"prd".equals(property("environment"))
 || "stg".equals(property("environment"))'>
        <then>
            <property name="APPLINK_LOG_LEVEL" value="warn"/>
        </then>
        <else>
            <property name="APPLINK_LOG_LEVEL" value="debug"/>
        </else>
    </if>

    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <!-- encoders are assigned the type
     ch.qos.logback.classic.encoder.PatternLayoutEncoder by default -->
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>

    <root level="${APPLINK_LOG_LEVEL}">
        <appender-ref ref="STDOUT"/>
    </root>
</configuration>