endoscopy example doesn't work out of the box

The endoscopy example needs the endovis data, but this isn't referred to on the page, nor are there any instructions for downloading the correct data. We downloaded a sample set from a MONAI tutorial, and this gave us 9 jpg frames. When we started the MONAI label server, all 9 frames were loaded in slicer. I imagine this should have been just 1 file so that we could do the segmentation and then get the next frame.

More info on how to get the example running on the README would be beneficial.

从内窥镜示例的 README 开始，确认 Slicer 中的 MONAI Label 服务器所需的 endovis 数据。记录正确数据的下载位置以及如何启动示例；当新用户能够加载预期数据并继续完成分割工作流时，即视为完成。