DOCS: Migrated documentation website to Gitbook (#1809)

documentation/providers/ns1.md

@@ -0,0 +1,31 @@
+## Configuration
+
+To use this provider, add an entry to `creds.json` with `TYPE` set to `NS1`
+along with your NS1 api key.
+
+Example:
+
+```json
+{
+  "ns1": {
+    "TYPE": "NS1",
+    "api_token": "your-ns1-token"
+  }
+}
+```
+
+## Metadata
+This provider does not recognize any special metadata fields unique to NS1.
+
+## Usage
+An example `dnsconfig.js` configuration:
+
+```javascript
+var REG_NONE = NewRegistrar("none");
+var DSP_NS1 = NewDnsProvider("ns1");
+
+D("example.tld", REG_NONE, DnsProvider(DSP_NS1),
+    A("test", "1.2.3.4")
+);
+```
+