update README

README.md

@@ -1,3 +1,36 @@
-bolt
+Bolt
 ====
-README text here.
+
+Bolt is an automation DSL, similar to [http://fabfile.org](http://fabfile.org)
+
+Example:
+
+```
+#! /usr/bin/env racket
+#lang racket
+
+(require "src/bolt.rkt")
+
+; This is based on an entry in ~/.ssh/config
+(define metaverse
+    (remote
+    #:host "hostname"
+    #:user "alice"
+    #:key "/home/alice/.ssh/id_rsa.key"))
+
+(define (deploy)
+  (with-host metaverse
+    (with-shell-vars
+      (["FOO" "BAR"])
+      (become "alice"
+      (copy-dir "../myode" "/home/alice/mycode")
+
+      (with-cwd "/home/alice/mycode"
+
+        (become "root"
+          (exec "pip install pipenv"))
+
+        (with-cwd "project"
+          (exec "pipenv install")))))))
+(deploy)
+```