@unchainedshop/plugins/src/presets/base-express.ts

Because of a Typescript issue with upstream "postfinancecheckout", the Postfinance plugin has been disabled from transpilation, import the source ts files from src and enable node_module tsc or copy over the src/payment/postfinance-checkout to your projec

import handler from '../files/gridfs/handler-express.js';

const { GRIDFS_PUT_SERVER_PATH = '/gridfs' } = process.env;

export default (app) => {
  app.use(GRIDFS_PUT_SERVER_PATH, handler);
};