fix for portainer build fail

docker-compose.yml

@@ -43,6 +43,6 @@ services:
       - API_HOST=http://kokoro-fastapi  # Set TTS service URL
       - API_PORT=8880  # Set TTS service PORT
       - VOICE_SPEED=${VOICE_SPEED}
+      - DOCKER_BUILDKIT=0
     labels:
       com.centurylinklabs.watchtower.enable: false
-