add(node-exporter): add node-exporter to dependency train (#9059)

**Description**
This needs to be added, because the bitnami variant we previously used,
is not signed.

**⚙️ Type of change**

- [x] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

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---------

Signed-off-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>

charts/dependency/node-exporter/values.yaml

@@ -0,0 +1,84 @@
+image:
+  repository: tccr.io/truecharts/node-exporter
+  pullPolicy: IfNotPresent
+  tag: v1.5.0@sha256:674e04af703ffb85daf5cbddc64c5fc92e75ba49a5e2b0c0d14a2a8ccace3590
+
+service:
+  main:
+    ports:
+      main:
+        protocol: http
+        port: 9100
+
+workload:
+  main:
+    type: DaemonSet
+    replicas: 2
+    strategy: RollingUpdate
+    podSpec:
+      containers:
+        main:
+          args:
+            - --path.procfs=/host/proc
+            - --path.sysfs=/host/sys
+            - --web.listen-address=0.0.0.0:{{ .Values.service.main.ports.main.port }}
+          probes:
+            liveness:
+              path: /
+              port: main
+
+            readiness:
+              path: /
+              port: main
+
+            startup:
+              type: tcp
+              port: main
+
+podOptions:
+  hostNetwork: true
+  hostPID: true
+
+persistence:
+  proc:
+    enabled: true
+    hostPath: /proc
+    mountPath: /host/proc
+    readOnly: true
+  sys:
+    enabled: true
+    hostPath: /sys
+    mountPath: /host/sys
+    readOnly: true
+
+metrics:
+  main:
+    # -- Enable and configure a Prometheus serviceMonitor for the chart under this key.
+    # @default -- See values.yaml
+    enabled: true
+    type: serviceMonitor
+    endpoints:
+      - port: main
+        path: /metrics
+    # -- Enable and configure Prometheus Rules for the chart under this key.
+    # @default -- See values.yaml
+    prometheusRule:
+      enabled: false
+      labels: {}
+      # -- Configure additionial rules for the chart under this key.
+      # @default -- See prometheusrules.yaml
+      rules:
+        []
+        # - alert: UnifiPollerAbsent
+        #   annotations:
+        #     description: Unifi Poller has disappeared from Prometheus service discovery.
+        #     summary: Unifi Poller is down.
+        #   expr: |
+        #     absent(up{job=~".*unifi-poller.*"} == 1)
+        #   for: 5m
+        #   labels:
+        #     severity: critical
+
+portal:
+  open:
+    enabled: false