{%- for category, config in nsd.get('config_data').items() %}
{{ category }}:
{%- for option, value in config.items() %}
  {%- if value is string or value is number %}
  {{ option }}: {{ value }}
  {%- elif value is iterable %}
  {%- for item in value %}
  {{ option }}: {{ item }}
  {%- endfor %}
  {%- endif %}
{%- endfor %}
{%- endfor %}