playground/README: Suggest gopherjs serve command.

dmitshur · dmitshur · commit 256347324a58 · 2015-05-31T15:15:33.000-07:00
Now that gopherjs has a capable serve command built in (see gopherjs/gopherjs#121), it's better to suggest using it directly. This way there's no need to download and learn to use a separate command when this functionality is now available upstream in gopherjs itself. /cc @ajhager Also update description of what the update.sh script does. It does not pull the latest version, it simply does `go install ...gopherjs` which installs whatever version you have locally.
diff --git a/playground/README.md b/playground/README.md
@@ -6,11 +6,12 @@ A secondary motivation is making the playground usable for other projects, such
 
 ## Development
 
-To update the entire playground environment, run the `update.sh` script. It will pull the latest gopherjs compiler, rebuild and copy the standard library into the `pkg` directory, and build the playground.
+To update the entire playground environment, run the `update.sh` script. It will install your local version of gopherjs compiler, rebuild and copy the standard library into the `pkg` directory, and build the playground.
 
-Working on the application itself is made easier by using the [SRVi](https://github.com/ajhager/srvi) utility to rebuild and serve the playground every time you refresh the browser.
+Working on the application itself is made easier by using the `gopherjs serve` command to rebuild and serve the playground every time you refresh the browser.
 
 ```bash
-go get -u github.com/ajhager/srvi
-srvi -index index.html -endpoint playground.js playground.go
+gopherjs serve
 ```
+
+Then open <http://localhost:8080/github.com/gopherjs/gopherjs.github.io/playground>.
