Support chart customization for ingress installation

Problem to solve

Former title: Add SSL support for the AWS load balancer with ingress

We've integrated our gitlab projects to Kubernetes, running the kubernetes clusters in AWS EKS. We use helm, tiller and the auto-deploy-app chart to deploy to the cluster, also use ingress to allow external access to our apps. Ingress automatically creates the nginx config as well as a classic load balancer in AWS. However it appears that it doesn't create/install SSL certs for the load balancer ssl listeners in AWS. Can you please advise if there is a way to customize this configuration to add the certs or will it be possible to add the config to the existing installation?

I've installed ingress from the project under Operations -> Kubernetes -> Applications -> Ingress

Target audience

Operators, developers

Further details

Proposal

Allow users to configure controller parameters when installing ingress via GitLab's k8s integration.

What does success look like, and how can we measure that?

Links / references

/label ~"feature proposal"