DOCS: Migrated documentation website to Gitbook (#1809)

documentation/providers/netcup.md

@@ -0,0 +1,35 @@
+## Configuration
+
+To use this provider, add an entry to `creds.json` with `TYPE` set to `NETCUP`
+along with your [api key, password and your customer number](https://www.netcup-wiki.de/wiki/CCP_API#Authentifizierung).
+
+Example:
+
+```json
+{
+  "netcup": {
+    "TYPE": "NETCUP",
+    "api-key": "abc12345",
+    "api-password": "abc12345",
+    "customer-number": "123456"
+  }
+}
+```
+
+## Usage
+An example `dnsconfig.js` configuration:
+
+```javascript
+var REG_NONE = NewRegistrar("none");
+var DSP_NETCUP = NewDnsProvider("netcup");
+
+D("example.tld", REG_NONE, DnsProvider(DSP_NETCUP),
+    A("test", "1.2.3.4")
+);
+```
+
+
+## Caveats
+Netcup does not allow any TTLs to be set for individual records. Thus in
+the diff/preview it will always show a TTL of 0. `NS` records are also
+not currently supported.