doc: Add logging information to the README

README.md

@@ -42,6 +42,33 @@ docker compose up -d
 
 The bot can now be invited with the following URL: `https://discord.com/oauth2/authorize?client_id=<application-id>&scope=applications.commands%20bot&permissions=513`
 
+## Logging
+
+Logging can be configured via a [Logback configuration](https://logback.qos.ch/).
+The [default logger configuration](bot/src/main/resources/logback.xml) can be overwritten with the `LOGBACK_CONFIGURATION_FILE`
+variable with the path to the file.
+
+One can add following example configuration to configure the logger for the `de.hhhammer.dchat.discord.ws` package to log
+the `DEBUG` level:
+
+```text
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+    
+    <logger name="de.hhhammer.dchat.discord.ws" level="DEBUG"/>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>
+```
+
+For more information regarding the logger configuration refer to the [manual](https://logback.qos.ch/manual/index.html).
+
 ## LICENSE
 
 The software is licensed under the [MPL-2.0](LICENSE) license.

bot/src/main/resources/logback.xml

@@ -0,0 +1,11 @@
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT"/>
+    </root>
+</configuration>