Kubernetes enhancements

[YuryHrytsuk]

Tasks

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1. [traefik] Break down unwieldy extraObjects value in multiple easy-to-manage separate parts (e.g. follow a subchart approach) OPTIONAL
2. [traefik] Introduce ip_allowlist middleware
3. [traefik] Use common port for http --> https redirect
4. Kubernetes: set up local deployment & tooling #696
   p:mid-prio t:enhancement +2
   
5. helmfile apply fails when nothing is installed (cert-manager CRDs issue and traefik crds issue)
6. Introduce Portainer (or similar tool)
7. Detect when service cannot start. Now we are blind and will not notice if sth fails to start
8. Kubernetes: multi-node cluster and node-labelled pods #805
   7 of 7
   p:mid-prio +1
   
9. CI clone repos job for Kubernetes cluster
10. make helmfile-diff fails if nothing is installed (error coming from traefik chart)
11. configure ssh and users on machines