Reduce dependencies, fix broken script

app/assets/javascripts/docker_manager.js

@@ -1,7 +1,7 @@
 $(function(){
   Discourse.MessageBus.start();
   Discourse.MessageBus.subscribe("/docker/log", function(message){
-    if(message == "DONE"){
+    if(message === "DONE"){
       $("button.upgrade").attr("disabled", false);
     } else {
       $("#log").append($("<pre>" + message + "<pre>"));

app/views/docker_manager/admin/index.html.erb

@@ -29,11 +29,16 @@
     <h2>Log</h2>
     <div id="log"></div>
     <div id="main"></div>
-
-    <%= javascript_include_tag "preload_store" %>
-    <%= javascript_include_tag "locales/#{I18n.locale}" %>
-    <%= javascript_include_tag "vendor" %>
-    <%= javascript_include_tag "application" %>
+    <script>
+      Discourse = {};
+    </script>
+    <%= javascript_include_tag "jquery_include.js" %>
+    <%= javascript_include_tag "message-bus" %>
+    <script>
+      Discourse.MessageBus = window.MessageBus;
+      Discourse.ajax = $.ajax;
+      Discourse.MessageBus.start();
+    </script>
     <%= javascript_include_tag "docker_manager" %>
   </body>
 </html>

plugin.rb

@@ -10,7 +10,7 @@ module ::DockerManager
   end
 end
 
-Rails.configuration.assets.precompile += ['docker_manager.js']
+Rails.configuration.assets.precompile += ['docker_manager.js', 'jquery_include.js', 'message-bus']
 
 after_initialize do
   Discourse::Application.routes.append do