S3 configuration

Created a S3 config in the settings of meteor the files are transform to base64 by a client method and are uplaoded directly from the simple schema. The method to upload the file is only called on server side of the insert/update

implemented with the service, it creates a folders structure in the minio bucket and each service folder holds the images for it. When a service is deleted, it will map all the files and delete them one by one, which will delete the folder of the service in the same time