[nightscout] Add chart nightscout (#1515)

* add nightscout/cgm-remote-monitor chart

Signed-off-by: Nick Childers <nchilder@redhat.com>

charts/stable/nightscout/.helmignore

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+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/
+# OWNERS file for Kubernetes
+OWNERS
+# helm-docs templates
+*.gotmpl

charts/stable/nightscout/Chart.yaml

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+apiVersion: v2
+appVersion: 14.2.5
+description: nightscout helm package
+name: nightscout
+version: 1.0.0
+kubeVersion: ">=1.16.0-0"
+keywords:
+- nightscout
+home: https://github.com/k8s-at-home/charts/tree/master/charts/stable/nightscout
+icon: https://github.com/nightscout/cgm-remote-monitor/blob/master/static/images/favicon-96x96.png
+sources:
+- https://github.com/nightscout/nightscout-docker
+maintainers:
+- name: nchilder
+  email: nchilder@redhat.com
+dependencies:
+- name: common
+  repository: https://library-charts.k8s-at-home.com
+  version: 4.3.0
+annotations:
+  artifacthub.io/changes: |
+    - kind: added
+      description: Initial version

charts/stable/nightscout/README.md

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+# nightscout
+
+![Version: 1.0.0](https://img.shields.io/badge/Version-1.0.0-informational?style=flat-square) ![AppVersion: 1.0.0](https://img.shields.io/badge/AppVersion-1.0.0-informational?style=flat-square)
+
+nightscout helm package
+
+**This chart is not maintained by the upstream project and any issues with the chart should be raised [here](https://github.com/k8s-at-home/charts/issues/new/choose)**
+
+## Source Code
+
+* <https://github.com/nightscout/nightscout-docker>
+
+## Requirements
+
+Kubernetes: `>=1.16.0-0`
+
+## Dependencies
+
+| Repository | Name | Version |
+|------------|------|---------|
+| https://library-charts.k8s-at-home.com | common | 4.0.0 |
+
+## TL;DR
+
+```console
+helm repo add k8s-at-home https://k8s-at-home.com/charts/
+helm repo update
+helm install nightscout k8s-at-home/nightscout
+```
+
+## Installing the Chart
+
+To install the chart with the release name `nightscout`
+
+```console
+helm install nightscout k8s-at-home/nightscout
+```
+
+## Uninstalling the Chart
+
+To uninstall the `nightscout` deployment
+
+```console
+helm uninstall nightscout
+```
+
+The command removes all the Kubernetes components associated with the chart **including persistent volumes** and deletes the release.
+
+## Configuration
+
+Read through the [values.yaml](./values.yaml) file. It has several commented out suggested values.
+Other values may be used from the [values.yaml](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common/values.yaml) from the [common library](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common).
+
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`.
+
+```console
+helm install nightscout \
+  --set env.TZ="America/New York" \
+    k8s-at-home/nightscout
+```
+
+Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart.
+
+```console
+helm install nightscout k8s-at-home/nightscout -f values.yaml
+```
+
+## Custom configuration
+
+N/A
+
+## Values
+
+**Important**: When deploying an application Helm chart you can add more values from our common library chart [here](https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common)
+**Important**: Some of the below environment variables are **required** to be set for Nightscout to function.
+
+| Key | Type | Default | Description |
+|-----|------|---------|-------------|
+| env | object | See below | environment variables. See more environment variables in the [Nightscout documentation](https://github.com/nightscout/cgm-remote-monitor#environments). |
+| env.TZ | string | `"UTC"` | Set the container timezone |
+| env.MONGODB_URI | none | **REQUIRED**: MongoDB URI |
+| env.API_SECRET | none | **REQUIRED**: API secret. Must be at least 12 characters long. |
+| env.MONGODB_COLLECTION | `"entries"` | **REQUIRED**: MongoDB collection where entries are stored. |
+| env.DISPLAY_UNITS | `"mg/dl"` | **REQUIRED**: Display units for BG values. Valid values are mg/dl or mmol |
+| image.pullPolicy | string | `"IfNotPresent"` | image pull policy |
+| image.repository | string | `"nightscout/nightscout"` | image repository |
+| image.tag | string | chart.appVersion | image tag |
+| ingress.main | object | See values.yaml | Enable and configure ingress settings for the chart under this key. |
+| persistence | object | See values.yaml | Configure persistence settings for the chart under this key. |
+| service | object | See values.yaml | Configures service settings for the chart. |
+
+## Changelog
+
+### Version 1.0.0
+
+#### Added
+
+- Initial version
+
+#### Changed
+
+N/A
+
+#### Fixed
+
+N/A
+
+## Support
+
+- See the [Docs](https://docs.k8s-at-home.com/our-helm-charts/getting-started/)
+- Open an [issue](https://github.com/k8s-at-home/charts/issues/new/choose)
+- Ask a [question](https://github.com/k8s-at-home/organization/discussions)
+- Join our [Discord](https://discord.gg/sTMX7Vh) community
+
+----------------------------------------------
+Autogenerated from chart metadata using [helm-docs v1.5.0](https://github.com/norwoodj/helm-docs/releases/v1.5.0)

charts/stable/nightscout/README_CONFIG.md.gotmpl

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+{{- define "custom.custom.configuration.header" -}}
+## Custom configuration
+{{- end -}}
+
+{{- define "custom.custom.configuration" -}}
+{{ template "custom.custom.configuration.header" . }}
+
+N/A
+{{- end -}}

charts/stable/nightscout/templates/NOTES.txt

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+{{- include "common.notes.defaultNotes" . -}}

charts/stable/nightscout/templates/common.yaml

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+{{ include "common.all" . }}

charts/stable/nightscout/values.yaml

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+#
+# IMPORTANT NOTE
+#
+# This chart inherits from our common library chart. You can check the default values/options here:
+# https://github.com/k8s-at-home/library-charts/tree/main/charts/stable/common/values.yaml
+#
+
+image:
+  # -- image repository
+  repository: nightscout/cgm-remote-monitor
+  # -- image tag
+  # @default -- chart.appVersion
+  tag:
+  # -- image pull policy
+  pullPolicy: IfNotPresent
+
+# -- environment variables. See more environment variables in the [Nightscout/cgm-remote-monitor documentation](https://github.com/nightscout/cgm-remote-monitor#environment).
+# @default -- See below
+env:
+  # -- Set the container timezone
+  TZ: UTC
+  # -- MongoDB URI, eg mongodb://sally:sallypass@ds099999.mongolab.com:99999/nightscout
+  MONGODB_URI: ''
+  # -- API secret, must be at least 12 characters long
+  API_SECRET: ''
+  # -- MongoDB collection for BG entries
+  MONGODB_COLLECTION: entries
+  # -- Display units for BG. Valid values are mg/dl or mmol
+  DISPLAY_UNITS: mg/dl
+
+# -- Configures service settings for the chart.
+# @default -- See values.yaml
+service:
+  main:
+    ports:
+      http:
+        port: 1337
+
+ingress:
+  # -- Enable and configure ingress settings for the chart under this key.
+  # @default -- See values.yaml
+  main:
+    enabled: false
+
+# -- Configure persistence settings for the chart under this key.
+# @default -- See values.yaml
+persistence: {}
+  # data:
+  #   enabled: false
+  #   mountPath: /data