Use line-buffered tee to flush log output immediately

Author: maratal

update.sh

@@ -7,7 +7,7 @@ set -euo pipefail
 # Redirect all output to the log file (and console via tee)
 LOG_FILE="/tmp/chatserver-update.log"
 rm -f "$LOG_FILE"
-exec > >(tee "$LOG_FILE") 2>&1
+exec > >(stdbuf -oL tee "$LOG_FILE") 2>&1
 
 # Configuration
 APP_NAME="chatserver"