update instructions for greenlock v4

README.md

@@ -30,26 +30,25 @@ Register and DuckDNS Domain and Save the API Token:
 
 # Usage
 
-First you create an instance with your credentials:
+Then you can use this with any compatible ACME library,
-
-```js
-var dns01 = require('acme-dns-01-duckdns').create({
-	baseUrl: 'https://www.duckdns.org/update', // default
-	token: 'xxxx'
-});
-```
-
-Then you can use it with any compatible ACME library,
 such as Greenlock.js or ACME.js.
 
-### Greenlock.js
+### Greenlock CLI
+
+```bash
+npx greenlock defaults --challenge-dns-01 acme-dns-01-duckdns --challenge-dns-01-token xxxx
+```
+
+### Greenlock API
 
 ```js
-var Greenlock = require('greenlock-express');
+greenlock.manager.defaults({
-var greenlock = Greenlock.create({
 	challenges: {
-		'dns-01': dns01
+		'dns-01': {
-		// ...
+			module: 'acme-dns-01-duckdns',
+	        baseUrl: 'https://www.duckdns.org/update', // default
+			token: 'xxxxxxx'
+		}
 	}
 });
 ```
@@ -60,11 +59,26 @@ documentation for more details.
 
 ### ACME.js
 
+First you create an instance with your credentials:
+
 ```js
-// TODO
+var dns01 = require('acme-dns-01-duckdns').create({
+	baseUrl: 'https://www.duckdns.org/update', // default
+	token: 'xxxx'
+});
 ```
 
-See the [ACME.js](https://git.rootprojects.org/root/acme-v2.js) for more details.
+```js
+acme.certificates.create({
+	account,
+	accountKey,
+	csr,
+	domains,
+	challenges: { 'dns-01': dns01 }
+});
+```
+
+See the [ACME.js](https://git.rootprojects.org/root/acme.js) for more details.
 
 ### Build your own