diff --git a/app/assets/javascripts/editor_edit.js b/app/assets/javascripts/editor_edit.js.erb
similarity index 89%
rename from app/assets/javascripts/editor_edit.js
rename to app/assets/javascripts/editor_edit.js.erb
index b1251cf9..fa3d40fc 100644
--- a/app/assets/javascripts/editor_edit.js
+++ b/app/assets/javascripts/editor_edit.js.erb
@@ -1,5 +1,6 @@
 $(function() {
-    var ACE_FILES_PATH = '/assets/ace/';
+    // ruby part adds the relative_url_root, if it is set.
+    var ACE_FILES_PATH = '<%= (defined? config.relative_url_root) && config.relative_url_root != nil && config.relative_url_root != "" ? config.relative_url_root : "" %>' + '/assets/ace/';
     var THEME = 'ace/theme/textmate';
 
     var configureEditors = function() {
diff --git a/codeocean-dockerconfig.md b/codeocean-dockerconfig.md
new file mode 100644
index 00000000..4facaee4
--- /dev/null
+++ b/codeocean-dockerconfig.md
@@ -0,0 +1,9 @@
+In order to make containers accessible for codeocean, they need to be reachable via tcp.
+For this, the docker daemon has to be started with the following options:
+
+DOCKER_OPTS='-H tcp://127.0.0.1:4243 -H unix:///var/run/docker.sock --iptables=false'
+
+This binds the daemon to the specified socket (for access via the command line on the machine) as well as the specified tcp url.
+Either pass these options to the starting call, or specify them in the docker config file.
+
+In Ubuntu, this file is located under: /ect/default/docker
\ No newline at end of file
diff --git a/config/environments/staging.rb b/config/environments/staging.rb
index 1cb098cb..5dfdae13 100644
--- a/config/environments/staging.rb
+++ b/config/environments/staging.rb
@@ -23,7 +23,7 @@ Rails.application.configure do
   config.serve_static_assets = false
 
   # Compress JavaScripts and CSS.
-  config.assets.js_compressor = :uglifier
+  # config.assets.js_compressor = :uglifier
   # config.assets.css_compressor = :sass
 
   # Do not fallback to assets pipeline if a precompiled asset is missed.
diff --git a/lib/docker_client.rb b/lib/docker_client.rb
index 6bcf7392..7fe02d02 100644
--- a/lib/docker_client.rb
+++ b/lib/docker_client.rb
@@ -72,7 +72,10 @@ class DockerClient
     # Headers are required by Docker
     headers = {'Origin' => 'http://localhost'}
 
-    socket = Faye::WebSocket::Client.new(DockerClient.config['ws_host'] + '/containers/' + @container.id + '/attach/ws?' + query_params, [], :headers => headers)
+    socket_url = DockerClient.config['ws_host'] + '/containers/' + @container.id + '/attach/ws?' + query_params
+    socket = Faye::WebSocket::Client.new(socket_url, [], :headers => headers)
+
+    Rails.logger.debug "Opening Websocket on URL " + socket_url
 
     socket.on :error do |event|
       Rails.logger.info "Websocket error: " + event.message