V0.0.3 release prep (#53)

* #27 refactor tube_register

* updated readme for v0.0.3 release

Readme.md

@@ -1,6 +1,7 @@
 ## Beanstalkg [![CircleCI](https://circleci.com/gh/vimukthi-git/beanstalkg.svg?style=svg)](https://circleci.com/gh/vimukthi-git/beanstalkg)
 
-Beanstalkg is a golang implementation of [beanstalkd](https://github.com/kr/beanstalkd). Idea is to support the same set of features and protocol with the addition of
+Beanstalkg is a go implementation of [Beanstalkd](https://github.com/kr/beanstalkd) **a fast, general-purpose work queue**. 
+Idea is to support the same set of features and protocol with the addition of
 high availability and failover built in. You can read the plan.md if interested in contributing. 
 
 Right now it supports all the basic commands to run producers and workers. i.e "use", "put", "watch", "ignore", "reserve",  "delete", "release", "bury", "reserve-with-timeout". 
@@ -13,9 +14,30 @@ I wish to complete rest of the commands soon but any help is always appreciated.
 - Implemented in golang. More readable code with support for concurrency using awesome `go routines`.
 - Support for clustering(coming soon :)
 
-### Running Locally
 
-Please install golang(binaries will be released in the future) and then clone this repo and from the root run,
+### User guide
+
+Beanstalkg is currently only released as a docker image for users. Latest release is v0.0.3. Assuming you already have a 
+working docker engine installation, you can start a Beanstalkg instance with following steps,
+
+- Run command `docker run -p 11300:11300 beanstalkg/beanstalkg:v0.0.3`. This will start the beanstalkg server in the foreground.
+ The server starts listening on port 11300.
+- Now you can connect to the server with any client library available to [beanstalkd](https://github.com/kr/beanstalkd/wiki/Client-Libraries). 
+ eg: Using [official go client](https://github.com/kr/beanstalk)
+    ```
+    // Produce jobs:
+    c, err := beanstalk.Dial("tcp", "127.0.0.1:11300")
+    id, err := c.Put([]byte("hello"), 1, 0, 120*time.Second)
+
+    // Consume jobs:
+    c, err := beanstalk.Dial("tcp", "127.0.0.1:11300")
+    id, body, err := c.Reserve(5 * time.Second)
+
+    ```
+
+### Developer guide
+
+Please install golang and then clone this repo and from the root run,
 
 - `go install`
 - `go run main.go`