some questions on Elaina

[xgdyp]

Hello, I'm very interested in this project. Thanks for your work! Here are some of my questions:

1. When I use Nodejs 16.14.0 to build frontend package, I run wrong. I switched to Node12 and it run successfully. I think there may have some problems in different Node version. Could we pointed which version can be used in somewhere like Readme?
2. I also found in readme-cn, the picture displays differently. If you need, I can update this and add more docs on how to Getting Start
3. I don't know in our web service, can i get the result after running the code ?