[Feature Request] Add helm chart

[koeberlue]

Issue description

It would be great to add an option to deploy streama to a kubernetes cluster with helm.

It looks like more and more people are running a kubernetes cluster on their home server, e.g. https://github.com/k8s-at-home/

Helm would provide an easy way to get streama up and running easily on kubernetes. Since the application is already dockerized and the docker-compose setup looks straight forward, the helm chart should be uncomplicated as well.

Use cases:

• Run streama on a selfhosted kubernetes cluster
• Run streama on AWS or GKE (legal issues! For testing or content creators)
• Test streama locally with minikube (easy setup, runs on Windows too)
• ...

[just1not2]

I developed a Helm chart for Streama, available on ArtifactHub. It depends on the Bitnami MySQL chart (but of course, you may also use an external database) and uses Session Cookie Affinity to support multiple replicas. Every contribution on the Stream Helm chart repository is welcomed! Besides, feel free to report any bug.