tsconfig.server.json

{
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "esModuleInterop": false,
    "lib": ["es2017"],
    "module": "commonjs",
    "noEmit": false,
    "outDir": "build",
    "skipLibCheck": true,
    "target": "es2017"
  },
  "include": ["server/**/*.ts"]
}