1. npm init -y
2. npm install express
3. npm install typescript ts-node @types/express @types/node --save-dev
4. npm install --save-dev ts-node-dev
5. npm install --save-dev nodemon ts-node
6. npm install --save-dev jest @types/jest ts-jest
7. npm install @nestjs/testing --save-dev
8. npx tsc --init

package.json ... "scripts": { "test": "jest", "build": "tsc", "start": "node dist/index.js", "dev": "ts-node-dev --respawn src/index.ts", "start:dev": "nodemon --watch 'src/**/*.ts' --exec 'ts-node' src/index.ts" }, ...

tsconfig.json { "compilerOptions": { "target": "es2016", "module": "commonjs", "strict": true, "esModuleInterop": true, "skipLibCheck": true, "forceConsistentCasingInFileNames": true, "rootDir": "./src", "outDir": "./dist" }, "include": ["src"], "exclude": ["node_modules"] }

jest.config.js module.exports = { preset: "ts-jest", testEnvironment: "node", testMatch: ["/tests//*.spec.ts"], };

.gitignore node_modules/ dist/

Command list

tsc -w -> start watch mode

Structure src/ |-- controllers/ | |-- user.controller.ts |-- services/ | |-- user.service.ts |-- repositories/ | |-- user.repository.ts |-- models/ | |-- user.model.ts |-- tests/ | |-- user.controller.spec.ts