docs: Add initial documentation

docs/admin/example.telegraf.conf

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+# Global tags can be specified here in key="value" format.
+[global_tags]
+
+
+# Configuration for telegraf agent
+[agent]
+  interval = "10s"
+  round_interval = true
+  metric_batch_size = 1000
+  metric_buffer_limit = 10000
+  collection_jitter = "0s"
+  flush_interval = "10s"
+  flush_jitter = "0s"
+
+# Configuration for sending metrics to InfluxDB
+[[outputs.influxdb]]
+  urls = ["http://:::8086"]
+  database = "telegraf"
+  skip_database_creation = true 
+  username = 'telegraf'
+  password = 'yourpassword'
+
+[[inputs.http]]
+  urls = ["https://notfellchen.org/metrics/"]
+  name_override = "notfellchen"
+  #Data from HTTP in JSON format
+  data_format = "json"
+