tsconfig.json

{
    "compilerOptions": {
        "module": "commonjs",
        "noImplicitAny": true,
        "target": "ES2017",
        "experimentalDecorators": true,
        "strictNullChecks": true,
        "noUnusedParameters": false,
        "noFallthroughCasesInSwitch": true,
        "noUnusedLocals": true,
        "emitDecoratorMetadata": true,
        "lib": [
            "esnext"
        ],
        "allowJs": true,
        "skipLibCheck": true,
        "esModuleInterop": true,
        "allowSyntheticDefaultImports": true,
        "strict": true,
        "forceConsistentCasingInFileNames": true,
        "moduleResolution": "Node",
        "resolveJsonModule": true,
        "isolatedModules": true,
        "noEmit": false,
        "strictPropertyInitialization": false,
        "types": [
            "reflect-metadata",
        ],
        "outDir": "./build",
    },
    "exclude": [
        "./node_modules"
    ]
}