diff --git a/Dockerfile b/Dockerfile
index 6faeffe5..d17e68ca 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,10 +17,25 @@ RUN apt-get update && apt-get install -y yarn netcat
 
 RUN mkdir /app/log
 
-COPY . /app/
+COPY COPYING /app/
+COPY config /app/config/
 COPY config/database.docker.yml /app/config/database.yml
 COPY config/site.docker.yml /app/config/site.yml
 
+COPY bin /app/bin/
+COPY script /app/script/
+COPY public /app/public/
+COPY vendor /app/vendor/
+
+COPY .yardopts /app/
+COPY Rakefile /app/
+COPY config.ru /app/
+COPY docker-entrypoint.sh /app/
+
+COPY lib /app/lib/
+COPY app /app/app/
+COPY db /app/db/
+
 RUN RAILS_ENV=production bundle exec rake assets:precompile
 
 ENTRYPOINT ["/app/docker-entrypoint.sh"]
diff --git a/app/controllers/data_controller.rb b/app/controllers/data_controller.rb
index e9893f16..610ae047 100644
--- a/app/controllers/data_controller.rb
+++ b/app/controllers/data_controller.rb
@@ -62,12 +62,16 @@ class DataController < ApplicationController
         flash[:notice] = t 'data.import.projects_count', count: count
       when 'todos'
         count = Todo.import path_and_file, params, current_user
-        flash[:notice] = t 'data.import.todos.count', count: count
+        if !count
+          flash[:error] = t('data.import.errors.no_context')
+        else
+          flash[:notice] = t 'data.import.todos_count', count: count
+        end
       else
         flash[:error] = t('data.import.errors.invalid_destination')
       end
     rescue Exception => e
-      flash[:error] = t 'data.import.invalid_destination', e: e
+      flash[:error] = t 'data.import.errors.invalid_destination', e: e
     end
     File.delete(path_and_file)
     redirect_to import_data_path
diff --git a/app/models/todo.rb b/app/models/todo.rb
index c97f3ade..acfe032f 100644
--- a/app/models/todo.rb
+++ b/app/models/todo.rb
@@ -353,6 +353,7 @@ class Todo < ApplicationRecord
 
   def self.import(filename, params, user)
     default_context = user.contexts.order('id').first
+    return false if default_context.nil?
 
     count = 0
     CSV.foreach(filename, headers: true) do |row|
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 983aee73..67613cee 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -207,6 +207,7 @@ en:
         invalid_csv: "Invalid CSV: could not read headers: %{e}"
         save_error: "Could not save uploaded CSV (%{path_and_file}). Can Tracks write\
           \ to the upload directory? %{e}"
+        no_context: No default context could be found
       map_title: Map fields to be imported
       header: Importing data
       submit: Import
diff --git a/public/uploads/csv/.keep b/public/uploads/csv/.keep
new file mode 100644
index 00000000..e69de29b