Update readme

Author: ebeigarts

README.md

@@ -1,13 +1,39 @@
 # Deployer
 
+###
+
 1. Listen to new GitHub deployments
-2. Create pending GitHub deployment status
-3. Deploy application to locally installed dokku
+2. Create pending GitHub deployment status and empty Gist
+3. Deploy application to dokku and update Gist
 4. Create success/failure Github deployment status
 5. Sleep
 6. Go to step #1
 
+## Usage
+
+```bash
+deployer -h
+```
+
+```
+  -app string
+    	Dokku application name (required)
+  -env string
+    	Github deployment environment (required)
+  -org string
+    	GitHub org (required)
+  -p string
+    	GitHub password (required)
+  -repo string
+    	GitHub repo (required)
+  -sleep int
+    	Time to sleep between loops (defaults to 30 seconds) (default 30)
+  -u string
+    	GitHub username (required)
+```
+
+## Build
+
 ```bash
 make
-./deployer -h
 ```