feat: Create Prometheus Node Exporter user.

prometheus-slave/README.md

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+# Install Prometheus Node Exporter
+
+## How to run playbook
+
+```
+INVENTORY=vps.example.com,
+ansible-playbook -i $INVENTORY -e ansible_python_interpreter=/usr/bin/python3 main.yml
+```

prometheus-slave/main.yml

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+---
+- name: Install Prometheus Node Exporter
+  hosts: all
+  become: yes
+
+  tasks:
+    - name: Create node-exporter group
+      group:
+        name: "node-exporter"
+        state: present
+        system: true
+
+    - name: Create node-exporter user
+      user:
+        name: "node-exporter"
+        group: "node-exporter"
+        comment: "Node Exporter"
+        shell: /bin/false
+        home: "/usr/local/bin/node-exporter"
+        system: true
+        state: present