update vweb readme

vlib/vweb/README.md

@@ -1,8 +1,12 @@
+This is pre-alpha software.
+
+Lots of things are broken and not implemented yet in V and vweb.
+
 There's no documentation yet, have a look at https://github.com/vlang/vtalk for an example of a simple vweb app.
 
 `vtalk.v` contains all GET and POST actions.
 
-```
+```Go
 pub fn (app mut App) index() {
 	posts := app.find_all_posts()
 	$vweb.html()
@@ -25,7 +29,7 @@ pub fn (app App) post() {
 
 `index.html` is an example of the V template language:
 
-```
+```html
 @for post in posts 
 	<div class=post>
 		<a class=topic href="@post.url">@post.title</a> 
@@ -39,3 +43,9 @@ pub fn (app App) post() {
 `$vweb.html()` compiles an HTML template into V during compilation, and embeds the resulting code in current action.
 
 That means that the template automatically has access to that action's entire environemnt.
+
+
+### Deploying vweb apps
+
+Everything, including HTML templates, is in one binary file. That's all you need to deploy.
+