Now site_config.json validation is ok with below configuration. “,” was missing in front of db_password.
{
"db_name": "site1.local",
"db_password": "*********",
"host_name": "http://domain.org"
}
I have verified the outgoing communication from system and its going with right link “http://domain.org/…”
Thank you so much Rushabh & Pratik. You helped me resolve an issue with which I was struggling since last one week.