Make dashboard API URL configurable #237
Description
Atm dashboard API URL is static in the dashboard library. See https://github.com/kernelci/kci-dev/blob/main/kcidev/libs/dashboard.py#L11
We need to use different dashboard API URLs for staging and production.
Use settings file i.e kci-dev.toml to define DASHBOARD_API. Define it under staging and production sections.