Define private registry in package.json

One of the method i know that is by .npmrc You can also use .npmrc also inside the project

set configuration like this

registry = http://10.197.142.28:8081/repository/npm-internal/
init.author.name = Himanshu sharma
init.author.email = [email protected]
init.author.url = http://blog.example.com
# an email is required to publish npm packages
[email protected]
always-auth=true
_auth=YWRtaW46YWRtaW4xMjM=

auth can be generate by username:password echo -n 'admin:admin123' | openssl base64

output YWRtaW46YWRtaW4xMjM=