README.md in rack-server_status-0.0.3 vs README.md in rack-server_status-0.0.4

@@ -17,11 +17,54 @@
 Or install it yourself as:
 
     $ gem install rack-server_status
 
 ## Usage
+### Getting started
+Tell your app to use the Rack::ServerStatus middleware.
 
-TODO: Write usage instructions here
+#### For Rails 3+ apps
+
+```
+# In config/application.rb
+config.middleware.use Rack::ServerStatus, scoreboard_path: './tmp'
+```
+
+#### Rackup files
+
+```
+# In config.ru
+use Rack::ServerStatus, scoreboard_path: './tmp'
+```
+
+### Get Status
+
+```
+% curl http://server:port/server-status
+Uptime: 1432227723 (12 seconds)
+BusyWorkers: 1
+IdleWorkers: 3
+--
+pid status remote_addr host method uri protocol ss
+55091 _  -    0
+55092 _  -    1
+55093 A 127.0.0.1 localhost:3000 GET /server-status HTTP/1.1 0
+55094 _  -    0
+
+# JSON format
+% curl http://server:port/server-status?json
+{"Uptime":1432388968,"BusyWorkers":1,"IdleWorkers":3,"stats":[{"remote_addr":null,"host":"-","method":null,"uri":null,"protocol":null,"pid":87240,"status":"_","ss":2},{"remote_addr":"127.0.0.1","host":"localhost:3000","method":"GET","uri":"/server-status?json","protocol":"HTTP/1.1","pid":87241,"status":"A","ss":0},{"remote_addr":null,"host":"-","method":null,"uri":null,"protocol":null,"pid":87242,"status":"_","ss":3},{"remote_addr":null,"host":"-","method":null,"uri":null,"protocol":null,"pid":87243,"status":"_","ss":3}]}
+```
+
+## Configuration
+
+| name | detail | example | default |
+|------|--------|---------|---------|
+| path | location that displays server status | `path: '/server-status'` | `/server-status` |
+| allow | host based access control of a page of server status. | `allow: ['127.0.0.1']` | `[]` |
+| scoreboard | scoreboard directory | `scoreboard_path: './tmp'` | nil |
+| skip_ps_command |  | `skip_ps_command: true` | false |
+
 
 ## Contributing
 
 1. Fork it ( https://github.com/[my-github-username]/rack-server_status/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)