CASCADE's kubernetes manifests.

### Circular dependency

This repo lives in git.strudelline.net.
This repo creates the ingress for git.strudelline.net.

When this happens, it's possible that git.strudelline.net will not be available.

Depending on if haproxy-ingress is working, you may create only the ingress to
bootstrap via `kubectl create -f external-services/git.yaml`.

If haproxy-ingress is not working yet, configure argo to ignore SSL until
bootstrapped.

Alternatively, get rid of this dumb circular dependency.