For the back-end part, just download InterviewTask1 file and InterviewTask1.sln. Then you can start InterviewTask1.sln with Visual Studio and run the project. It should be openining browser with localhost:5001/api/ToDo. There should be [] on the opened window. After that you should build and run Vue.js part.
Build, config, src, static and index.html files should be put in the same directory. After that
# install dependencies which are in the package.json file.
npm install
# serve with hot reload at localhost:8080
npm run dev
# build for production with minification
npm run build
# build for production and view the bundle analyzer report
npm run build --report