add django subchart

.gitlab-ci.yml

chart/charts/django/.helmignore

chart/charts/django/Chart.yaml

chart/charts/django/templates/NOTES.txt

chart/charts/django/templates/_helpers.tpl

chart/charts/django/templates/_secretHelper.tpl

chart/charts/django/templates/deployment.yaml

chart/charts/django/templates/hpa.yaml

chart/charts/django/templates/ingress.yaml

chart/charts/django/templates/registry-pull-secret.yaml

chart/charts/django/templates/secret-credentials.yaml

chart/charts/django/templates/service.yaml

chart/charts/django/templates/serviceaccount.yaml

chart/charts/django/templates/tests/test-connection.yaml

chart/charts/django/values.yaml

chart/templates/_deployment-django.yaml