require() of ES modules is not supported.

import

{
  // <https://www.npmjs.com/package/@tsconfig/node14>
  "extends": "@tsconfig/node14/tsconfig.json",

  "compilerOptions": {
    "module": "esnext",
    "target": "ESNext",
    "allowJs": true,
    "esModuleInterop": true,
    "composite": true, // <https://www.typescriptlang.org/docs/handbook/project-references.html>
    "incremental": true,

    "jsx": "react-jsx", // better frontend/backend tooling interoperability (ts-jest)

    "moduleResolution": "node", // modern
    "declaration": true /* Generates corresponding '.d.ts' file. */,
    "declarationMap": true /* Generates a sourcemap for each corresponding '.d.ts' file. */,
    "sourceMap": true /* Generates corresponding '.map' file. */,
    // "resolveJsonModule": true, // allow importing JSON files
    "experimentalDecorators": true, // enable decorators
    "emitDecoratorMetadata": true, // for runtime use of decorators
    // "baseUrl": "packages", // allow absolute path imports for all project packages
    "strictPropertyInitialization": true,
    "strictNullChecks": true,
    // "noUnusedLocals": true /* Report errors on unused locals. */,
    // "noUnusedParameters": true /* Report errors on unused parameters. */,
    "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
    "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
    "noImplicitOverride": true // must use override
  }
}