read all the file and store in object format in node js / javascript

I wrote a code which help me to read all the folder file and make me store them in array format so my code looks like this

readAll.js

module.exports = readAllFile = () => {
  const arr = [];
  fs.readdir(path.join("./admin/requiredFiles"), (err, fileNames) => {
    if (err) throw console.log(err.message);
    // Loop fileNames array
    fileNames.forEach((filename) => {
      // Read file content
      fs.readFile(
        path.join("./admin/requiredFiles", `./${filename}`),
        (err, data) => {
          if (err) throw console.log(err.message);
          // Log file content
          arr.push(JSON.parse(data));
          fs.writeFileSync(
            path.join("./admin/execuetedFile", `config.json`),
            `${JSON.stringify(arr)}`,
            (err) => {
              if (err) throw console.log(err.message);
            }
          );
        }
      );
    });
  });
};

so this help me to read all the file which is present in admin/requiredFiles and let me save those file in executedFile

but the problem is this help me to store in array format but I want to store data in object form

suppose this is my few file data

file1.json

{
  "admin":{
    "right":"yes",
    "permission":"available"
  },
  "admin_power":{
    "addUser":"available",
    "deleteUser":"available"
  }
}

file2.json

{
  "directory":{
    "right":"yes",
    "permission":"modified"
  },
  "directory_power":{
    "add_directory":"yes",
    "assign_directory":"yes"
  }
}

so this are my some sample file and it help me to save them in format

config.json

[
 {
   "admin":{
     "right":"yes",
     "permission":"available"
   },
   "admin_power":{
     "addUser":"available",
     "deleteUser":"available"
   }
 },
 {
   "directory":{
     "right":"yes",
     "permission":"modified"
   },
   "directory_power":{
     "add_directory":"yes",
     "assign_directory":"yes"
   }
 }
]

and I don’t want this in this array form I want this copied files look like this

expectation config.json

{
   "admin":{
     "right":"yes",
     "permission":"available"
   },
   "admin_power":{
     "addUser":"available",
     "deleteUser":"available"
   },
   "directory":{
     "right":"yes",
     "permission":"modified"
   },
   "directory_power":{
     "add_directory":"yes",
     "assign_directory":"yes"
   }
 }

I just wanted to know what changes should I do so I can get output in my expectation format in config,json