diff --git a/README.md b/README.md
index a2be147..e53d330 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,51 @@
-# certmaestro
-Automatically renew certs and install to destinations
+# Certmaster
+
+Certmaster automates the process of renewing and installing SSL certificates.
+
+1. Creates an SSL cert from Let's Encrypt
+2. Validates certs using DNS
+3. Uploads or installs SSL certs to multiple destinations
+
+## Supported DNS
+
+Certmaster uses the excellent [go-acme/lego](https://github.com/go-acme/lego) repository
+to generate certificates and automate DNS validation. They support 100+ providers, which are 
+listed [here](https://go-acme.github.io/lego/dns/).
+
+## Supported Destinations
+
+1. Email
+2. SFTP
+3. Hetzner Load Balancer
+
+## Config
+
+Start with the example [config.json](config.json) and modify it.
+
+- To configure DNS providers, create JSON of the form:
+
+    ``` json
+    {
+        "provider": "route53",
+        "AWS_ACCESS_KEY_ID": "ACCESS_KEY_ID",
+        "AWS_SECRET_ACCESS_KEY": "SECRET_KEY"
+    }
+    ```
+
+    Here, `provider` is the provider name from `go-acme/lego`'s documentation. The rest of the
+    fields are configs specific to your DNS provider.
+
+- Similarly, you configure destinations with all details required to upload. 
+
+## Usage
+
+To update the certificate, just run:
+
+```
+$ ./certmaster create --config config.json
+```
+
+### AWS Lambda
+
+The Docker file is to use with AWS Lambda. When you invoke the function, 
+you send the same JSON payload as the normal config.
diff --git a/config.json b/config.json
index 709ba2c..96cac28 100644
--- a/config.json
+++ b/config.json
@@ -1,7 +1,36 @@
 {
+    "email": "hello@example.com",
     "domain": "example.com",
+    "dummy": false,
+    "stage": true,
     "dns": {
-
+        "provider": "route53",
+        "AWS_ACCESS_KEY_ID": "ACCESS_KEY_ID",
+        "AWS_SECRET_ACCESS_KEY": "SECRET_KEY"
     },
-    "destinations": []
+    "destinations": [
+        {
+            "provider": "email",
+            "from": "from@example.com",
+            "host": "email-smtp.us-east-1.amazonaws.com",
+            "port": "587",
+            "username": "SMTP_USER",
+            "password": "SMTP_PASSWORD",
+            "to": "to@example.com"
+        },
+        {
+            "provider": "hetzner",
+            "api_token": "HETZER_WRITABLE_API_TOKEN",
+            "load_balancer_id": "000000"
+        },
+        {
+            "provider": "sftp",
+            "user": "root",
+            "host": "1.1.1.1",
+            "port": "22",
+            "private_key": "-----BEGIN RSA PRIVATE KEY-----\n...\n-----END RSA PRIVATE KEY-----",
+            "certificate_destination": "/path/to/certificate.txt",
+            "private_key_destination": "/path/to/private.txt"
+        }
+    ]
 }
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