Helm Chart: Add NOTES.txt template & update chart.yaml

[richard-cox]

• Add NOTES template
• Add maintainers and keywords to chart.yaml
• contributes to Add Stratos helm chart repo to Helm Hub #4556

helm install lookes like....

$ helm install console stratos-ui/deploy/kubernetes/console --namespace=notes-test -f stratos.yaml
NAME: console
LAST DEPLOYED: Tue Sep 15 11:48:52 2020
NAMESPACE: notes-test
STATUS: deployed
REVISION: 1
TEST SUITE: None
NOTES:
Tech Preview is enabled, extra features will be shown.

To access Stratos:
Get the URL by running these commands in the same shell:
  export NODE_PORT=$(kubectl get --namespace notes-test -o jsonpath="{.spec.ports[0].nodePort}" services console-ui-ext)
  export NODE_IP=$(kubectl get nodes --namespace notes-test -o jsonpath="{.items[0].status.addresses[0].address}")
  echo https://$NODE_IP:$NODE_PORT

To learn more about the release, try:
  $ helm status console -n notes-test
  $ helm get values console -n notes-test
  $ kubectl get services -n notes-test
  $ kubectl get pods -n notes-test

[codecov-commenter]

Codecov Report

Merging #4557 into master will decrease coverage by 0.09%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4557      +/-   ##
==========================================
- Coverage   58.59%   58.49%   -0.10%     
==========================================
  Files         881      883       +2     
  Lines       29068    29237     +169     
  Branches     4196     4234      +38     
==========================================
+ Hits        17032    17103      +71     
- Misses      12036    12134      +98     

[nwmac]

See: https://github.com/helm/charts/blob/master/stable/prometheus/templates/NOTES.txt

[nwmac]

LGTM