README added

README.md

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+# GDE (Grafana Dashboard Exporter)
+
+GDE is an extremely powerful solution for backing up grafana dashboards. It's based on the influxdata telegraf theme.
+
+# Installation Procedure of GDE Agent
+##### Step 1: Download the [binary](https://github.com/vikramjakhr/grafana-dashboard-exporter/releases/releases/latest). Example command below.
+```
+wget https://github.com/vikramjakhr/grafana-dashboard-exporter/releases/download/beta-v1.0.0/gde.tar.gz
+```
+# Sample GDE config (/etc/gde/gde.conf)
+```
+[agent]
+  interval = "5m"
+  round_interval = true
+  debug = true
+  quiet = false
+  logfile = "/var/log/gde/gde.log"
+
+[[outputs.file]]
+  output_dir = "<dir>" # required
+  output_format = "zip" # zip, dir
+
+[[outputs.s3]]
+  bucket = "<bucket-name>" # required
+  access_key = ""
+  secret_key = ""
+  region = ""
+  bucket_prefix = ""
+  output_format = "zip" # zip, dir
+
+[[inputs.grafana]]
+  host = "http://<grafana-host>"
+  authorization = "Bearer <token>"
+  datasource = true
+  dashboard = true
+  org = true
+```