Reference issue: vincentmorneau/apex-publish-static-files#20
In apexnitro.cred.json should have the ability to provide a variable tns_admin so it could be set before calling apex-publish-static-files
Ex:
"path": "sqlcl",
"tns_admin": "/oracle/wallets/atp01",
"username": "your_username",
"password": "your_password",
"connectionString": "your_connection_string"
}