add server task

tasks/server.coffee

@@ -0,0 +1,21 @@
+module.exports = (grunt) ->
+  express = require("express")
+  compression = require("compression")
+  readYaml = require('read-yaml');
+
+  serverConfig = readYaml.sync("config/server.yml")
+
+  grunt.registerTask "server", "static file development server", =>
+    webPort = serverConfig.port || 8000
+    webHost = serverConfig.host || 'localhost'
+    webRoot = "generated/dapp"
+
+    app = express()
+    app.use(compression())
+    app.use(express.static("" + (process.cwd()) + "/" + webRoot))
+    app.listen(webPort, webHost)
+
+    grunt.log.writeln("Running web server on port http://#{webHost}:#{webPort}")
+
+    return app
+