Add note.txt to templates

helmchart/single-sign-on/templates/NOTES.txt

+Thank you for installing {{ .Chart.Name }}.
+
+Your release is named {{ .Release.Name }}. This chart has installed hydra with hydra-maester
+enabled. A separate consent- and login provider were installed which are handling login
+requested by your oAuth clients. On top of that an identity provider was installed which can
+be managed via a user-panel application.
+
+The userpanel can be reached via https://{{ .Values.userpanel.ingress.host }}. An admin user
+was created for you using the credentials set in the values.yaml file of this helmchart.
+
+    User: {{ .Values.userbackend.username }}
+    Email address: {{ .Values.userbackend.email }}
+    Password: {{ .Values.userbackend.password }}
+
+Please make sure to change the password!