Update README.md

README.md

@@ -1,2 +1,29 @@
-# node-letsencrypt-cli
-CLI for node-letsencrypt modeled after the official client
+# letsencrypt-cli
+
+CLI for node-letsencrypt modeled after the official client.
+
+## Install
+
+```bash
+npm install -g letsencrypt-cli
+```
+
+## Usage
+
+### Standalone
+
+```bash
+letsencrypt certonly \
+  --agree-tos --email john.doe@example.com \
+  --standalone \
+  --domains example.com,www.example.com
+```
+
+### WebRoot
+
+```bash
+letsencrypt certonly \
+  --agree-tos --email john.doe@example.com \
+  --webroot --webroot-path /srv/www/acme-challenge \
+  --domains example.com,www.example.com
+```