tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "ES2021",
    "lib": ["ES2021", "DOM"], // add DOM to avoid compile errors with node-fetch, see https://github.com/node-fetch/node-fetch/issues/1617#issuecomment-1231516415
    "sourceMap": true,
    "rootDir": "src",
    "strict": true /* enable all strict type-checking options */
    /* Additional Checks */
    // "noImplicitReturns": true, /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true, /* Report errors for fallthrough cases in switch statement. */
    // "noUnusedParameters": true,  /* Report errors on unused parameters. */
  }
}