tsconfig.json

{
  "compilerOptions": {
    "target": "ESNext",
    "module": "CommonJS",
    "lib": ["ESNext"],
    "outDir": "./build",
    "rootDir": "./src",
    "strict": true,
    "esModuleInterop": true,
    "resolveJsonModule": true,
    "allowSyntheticDefaultImports": true,
    "declaration": true,
    "sourceMap": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "noUnusedLocals": true,
    "strictNullChecks": true,
    "noImplicitReturns": true,
    "noUnusedParameters": true,
    "strictFunctionTypes": true,
    "noFallthroughCasesInSwitch": true,
    "baseUrl": "./",
    "paths": {
      "*": ["src/types/*"]
    },
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true
  },
  "include": ["src/**/*"],
  "exclude": ["node_modules", "**/*.spec.ts"]
}