Keep latest log in log.txt (not in log1.txt, etc.). https://github.com/Koenkk/zigbee2mqtt/issues/2855

lib/util/logger.js

@@ -58,6 +58,7 @@ if (output.includes('file')) {
         filename: path.join(directory, 'log.txt'),
         json: false,
         level,
+        tailable: true,
         maxFiles: 3, // Keep last 3 files
         maxsize: 10000000, // 10MB
         format: winston.format.combine(