config-overrides.js

module.exports = {
  webpack: function (config, env) {
    return config;
  },
  jest: function (config) {
    return config;
  },
  devServer: function (configFunction) {
    return function (proxy, allowedHost) {
      const config = configFunction(proxy, allowedHost);

      config.headers = {
        "Access-Control-Allow-Origin": "*",
        "Access-Control-Allow-Methods": "GET",
        "Access-Control-Allow-Headers":
          "X-Requested-With, content-type, Authorization",
      };

      return config;
    };
  },
  paths: function (paths, env) {
    return paths;
  },
};