git clone https://github.com/PracticeEveryday/unit-test.git
cd unit-test
yarn install
yarn test
1. yarn add -D jest typescript
2. yarn add -D ts-jest @types/jest
3. npx ts-jest config:init
4. yarn add --dev @babel/preset-typescript
yarn add express nodemon typescript @types/express @types/node ts-node pg -D
yarn add jest ts-jest @types/jest @babel/preset-typescript