Upload File to Mongo GridFsBucket

@ Upload File to MongoDB
import { Context } from 'moleculer';

export const upload = {
  handler(ctx: Context) {
    return new Promise((resolve, reject) => {
      const uploadStream = this.gridFSBucket.openUploadStream(ctx.meta.filename, {
        contentType: ctx.meta.type,
      });

      uploadStream
        .once('finish', () => {
          resolve(uploadStream.id);
        })
        .once('error', err => {
          ctx.broker.logger.error(err);
          reject(err);
        });

      ctx.params.pipe(uploadStream);
    });
  },
};