Add config API, GET /api/configs/apiKey. It needs /server/config/local.env.js
Delete config API, GET /api/configs
add ConfigService unit test on client side
add config API unit test on server side
delete thing API
Merge branch 'config_service' of https://github.com/Sanghyeon-encored/edge_web_home into config_service

Conflicts:
	server/config/environment/index.js
	server/routes.js