tsconfig.build.json

{
  "compilerOptions": {
    "target": "es2016" /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */,
    "module": "CommonJS", // Change this line
    // "moduleResolution": "node",
    "rootDir": "./src" /* Specify the root folder within your source files. */,
    "outDir": "./build" /* Specify an output folder for all emitted files. */,
    "removeComments": true /* Disable emitting comments. */,
    "esModuleInterop": true /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables 'allowSyntheticDefaultImports' for type compatibility. */,
    "forceConsistentCasingInFileNames": true /* Ensure that casing is correct in imports. */,
    "strict": true /* Enable all strict type-checking options. */,
    "skipLibCheck": true /* Skip type checking all .d.ts files. */,
    "resolveJsonModule": true /* Allow to import JSON files */
  },
  "include": ["./src"]
}