Allow setting annotations for deployments (#177)

This change basically forwards `raster-eoapi.annotations` to the
annotations of the respective deployment. There are no official guidelines
on key structuring, but this follows conventions set by other large charts
like [1] where properties on the top level object are forwarded to the
central kubernetes object, in this case the deployment.

Other objects could still be customized with sub-keys, e.g.
`raster-eoapi.service.annotations` could be applied to the respective
kubernetes service.

The values currently also contain a `settings` key. Since properties
like `image` or `command` are configured directly in `raster-eoapi`,
I've also placed the annotations directly here. However they could also
be moved to `settings`.

[1] https://artifacthub.io/packages/helm/grafana/grafana

Author: totycro

helm-chart/eoapi/templates/services/deployment.yaml

@@ -9,6 +9,10 @@ metadata:
     app: {{ $serviceName }}-{{ $.Release.Name }}
     gitsha: {{ $.Values.gitSha }}
   name: {{ $serviceName }}-{{ $.Release.Name }}
+  {{- with index $v "annotations" }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
 spec:
   progressDeadlineSeconds: 600
   revisionHistoryLimit: 5