Repo Auth / Middleware

[jtdroste]

(This is PR #4 - just correctly branched)

This PR adds two changes:

• Adds a new value scot4.common.imagePullSecrets. This accepts a kubernetes secret, to be used when pulling images. To preserve backward compatibility, the previous value has been set here. If you set this value to empty, then imagePullSecrets is removed from all deployments.
• Adds a new value scot4.frontend.enableTraefikMiddleware (default: true, for BC) and scot4.frontend.traefikMiddlewareVersion (default: traefik.containo.us/v1alpha1 as the previous/BC version). Setting enableTraefikMiddleware to false will disable middleware all together. In addition, you can override the middlewareVersion to the newer traefik CRD traefik.io/v1alpha1 if needed. I'll leave this up to ya'll if you just want to take the latest version.

Testing

Locally, via:

$ helm template scot4 ./scot4 --set scot4.common.imagePullSecret=""
$ helm template scot4 ./scot4 --set scot4.common.imagePullSecret="foobar"
$ helm template scot4 ./scot4 --set scot4.frontend.enableTraefikMiddleware="no"
$ helm template scot4 ./scot4 --set scot4.frontend.enableTraefikMiddleware="traefik.io/v1alpha1"