Upload a file into the Opal file system.
opal.file_upload(opal, source, destination)Opal object.
Path to the file in the local file system.
Path of the destination folder in the Opal file system.
Other file functions:
opal.file_cp(),
opal.file_download(),
opal.file_ls(),
opal.file_mkdir_tmp(),
opal.file_mkdir(),
opal.file_mv(),
opal.file_read(),
opal.file_rm(),
opal.file_write(),
opal.file()