Description The goal is to provide RESTful API (written in Java) and some UI (React.js is a plus) that will allow users to collaborate on text files (*.txt) in a way similar to how VCS (git/svn) works. You can use any libraries to create the application. Functional requirements Here is the list of operations that user should be able to perform: Upload new *.txt file (max 5MB) Update the content of any txt file uploaded to the service View history of changes for the particular file Revert file back to some revision All API endpoints should return JSON data in response Other requirements After revert - file’s revisions should be cleared until the current one (e.g. if file has revisions: 1,2,3,4,5 and user reverts to revision 3, new “revision tree” should look like: 1,2,3) ● Tests and input data validation are welcome, but not required Files’ and users’ data should be stored in the database (NoSQL DBs are welcome) No need to create any access restrictions - all users can access all files and perform all operations Results Send an archive or link to the git/svn with the source code and how to start your application.