composer install error about packagist-mirror HOT 3 CLOSED

$ cd packagist-mirror 
$ php bin/mirror create

Loading providers from https://repo.packagist.org
[1/12] Loading packages from p/provider-archived$*.json provider
[2/12] Loading packages from p/provider-2013$*.json provider
[3/12] Loading packages from p/provider-2014$*.json provider
[4/12] Loading packages from p/provider-2015$*.json provider
[5/12] Loading packages from p/provider-2018-07$*.json provider
[6/12] Loading packages from p/provider-latest$*.json provider
[7/12] Loading packages from p/provider-2018$*.json provider
[8/12] Loading packages from p/provider-2016$*.json provider
[9/12] Loading packages from p/provider-2019-04$*.json provider
[10/12] Loading packages from p/provider-2019-01$*.json provider
[11/12] Loading packages from p/provider-2018-10$*.json provider
[12/12] Loading packages from p/provider-2017$*.json provider
....

$ cd public
$ php -S localhost:8881

$ cd my_project
$ composer config -g repos.packagist composer http://localhost:8881
$ composer install

[Seld\JsonLint\ParsingException]
"http://localhost:8881/packages.json" does not contain valid JSON
Parse error on line 1:
\\\??͎
??y
^
Expected one of: 'STRING', 'NUMBER', 'NULL', 'TRUE', 'FALSE', '{', '['