Added production build docs

Also move html style to the index.html
Closes #1127

README.md

@@ -85,6 +85,10 @@ To run this application in Firefox as a packaged app, open "Menu" -> "Developer"
 
 Run `gulp watch` to watch for file changes and automatically rebuild the app.
 
+#### Running in production
+
+Run `gulp clean`, then `gulp publish` to build the minimized production version of the app. Copy `dist` folder contents to your web server. Don't forget to set `X-Frame-Options SAMEORIGIN` header ([docs](https://developer.mozilla.org/en-US/docs/Web/HTTP/X-Frame-Options)).
+
 
 ### Third party libraries
 

app/index.html

@@ -15,6 +15,12 @@
   <link rel="stylesheet" href="css/app.css"/>
   <!-- endbuild -->
 
+  <style>
+  html {
+    display: none;
+  }
+  </style>
+
   <!-- <link rel="stylesheet" href="css/font.css"/> -->
   <!-- <link href="https://fonts.googleapis.com/css?family=Open+Sans:400,600&amp;subset=cyrillic,cyrillic-ext,latin,latin-ext" rel="stylesheet" type="text/css"> -->
 

app/less/app.less

@@ -3,7 +3,6 @@
 /* app common css */
 
 html {
-  display: none;
   background: #e7ebf0;
   overflow: visible;
 }

app/webogram.appcache

@@ -1,6 +1,6 @@
 CACHE MANIFEST
 
-# 64
+# 65
 
 NETWORK:
 *