Can't send test alert to grafana oncall contact point.Showing me this error

[shivsharma]

Failed to send test alert.: Post “http://localhost:8080/integrations/v1/grafana_alerting/O3q5NKfFJb6HdU1BXefPtyV16/”: dial tcp 127.0.0.1:8080: connect: connection refused

For extra information I am running both grafana and oncall in containers.