Remove Extra Image Dependency

It seems the appropriate/curl image used in the init containers is from an archived repo that's also not widely used (https://github.com/appropriate/docker-curl), and the image also hasn't been updated in 4 years (https://registry.hub.docker.com/u/appropriate/curl/).

1. Remove init-binance from the optional thornode init containers (seems that was a leftover artifact from old infra)
2. Update bifrost to leverage alpine/k8s since that is already used elsewhere and contains the necessary curl dependency