Pass an array of hosts for the Ingress

[spwoodcock]

First off, thanks for eoAPI! We just had it deployed recently & it's been working nicely 😄

I had a small question / request regarding serving eoAPI from multiple domains at the same time.
We have the requirement to host eoAPI from an 'internally referenced' domain and an external domain (both are public).
For example:

• Internal reference: oam-eoapi-prod.imagery-services.k8s-prod.hotosm.org
• External reference: api.imagery.hotosm.org

Initially I tried a CNAME, but obviously this won't work, as Nginx expects the correct host to be set upon access.

I see the Ingress is configured to use a single domain, defined in the values.yaml under host:

eoapi-k8s/charts/eoapi/values.yaml

Lines 39 to 46 in e797241

	ingress:
	# Unified ingress configuration for both nginx and traefik
	enabled: true
	# ingressClassName: "nginx" or "traefik"
	className: "nginx"
	rootPath: "" # Root path for doc server
	# Host configuration
	host: ""

I was wondering how easily it would be to pass an array of hosts, then iterate to create a host item for each here?

Note

Kubernetes supports multiple hosts per Ingress.

[pantierra]

I think this is a valid use case and I suggest adding support via this PR: #249