Set up environment and run project

Set up

1. Need to install node.
2. Have one package manager tool. Seems there already has a npm, when you installed node or you can install yarn by yourself.
3. Run Command: npm install or yarn to install dependencies.

Run

1. Run first week: npm run week1 or yarn week1.
2. Run second week: npm run week2 or yarn week2.
3. Run third week: npm run week3 or yarn week3.

PS: When the project is running and you change the source file then save, the page in brower can be auto-reloaded.