Rewrote using functional component and hook. Fix dependencies and build. add link argument

[cshuphys]

The original front end dependency is broken thus can't be build. I fix the dependency, rewrite the frontend using functional component and hook. I also fix the gitignore so that node_module is ignored and removed. In addition, I add a new argument as link. So that when it opens a new window of that link when double click on any node.

Please review, thank!