n8n build error fix

Dockerfile

@@ -82,7 +82,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     && python3 -m venv $VIRTUAL_ENV \
     && $VIRTUAL_ENV/bin/pip install --no-cache-dir --upgrade pip requests yt-dlp youtube-transcript-api \
     # 安装 n8n
-    && npm install -g n8n@latest pnpm \
+    # We use --force to overwrite existing pnpx/pnpm binaries 
+    # provided by the base image
+    && npm install -g --force n8n@latest pnpm \
     && npm cache clean --force
 
 # 创建环境变量文件