Add helm chart for SearXNG

kubernetes/chart/templates/NOTES.txt

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

kubernetes/chart/templates/common.yaml

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+{{/* First Make sure all variables are set and merged properly */}}
+{{- include "common.values.setup" . }}
+
+{{/* Append the configMap volume to the volumes */}}
+{{- define "searxng.settingsVolume" -}}
+enabled: "true"
+mountPath: "/etc/searxng/settings.yml"
+subPath: "settings.yml"
+type: "custom"
+volumeSpec:
+  secret:
+    secretName: {{ include "common.names.fullname" . }}-config
+{{- end -}}
+{{- $_ := set .Values.persistence "searxng-config" (include "searxng.settingsVolume" . | fromYaml) -}}
+
+{{/* Render the templates */}}
+{{ include "common.all" . }}

kubernetes/chart/templates/configmap.yaml

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+{{- include "common.values.setup" . -}}
+---
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "common.names.fullname" . }}-config
+  labels:
+    {{- include "common.labels" . | nindent 4 }}
+data:
+  settings.yml: |-
+{{ toYaml .Values.searxng.config | b64enc | indent 4 }}