What is the purpose of this pull request? (put an "X" next to the item)
[ ] Documentation update
[ ] Bug fix
[ ] New feature
[x] Other, please explain: Avoid callback hell in the codebase
What changes did you make? (Give an overview)
Created file-system.js to encapsulate the logic of work with the file system and updated code for using this file with async/await code style.
What is the purpose of this pull request? (put an "X" next to the item)
[ ] Documentation update [ ] Bug fix [ ] New feature [x] Other, please explain: Avoid callback hell in the codebase
What changes did you make? (Give an overview) Created file-system.js to encapsulate the logic of work with the file system and updated code for using this file with async/await code style.