Added Dockerfile with some small updates

lib/tasks/test.rake

@@ -1,35 +1,37 @@
-require 'rspec/core/rake_task'
-require 'open3'
+if Rails.env.test?
+  require 'rspec/core/rake_task'
+  require 'open3'
 
-desc 'Run all specs against server'
-task 'test' do
-  test_against_server { Rake::Task['spec'].invoke }
-end
+  desc 'Run all specs against server'
+  task 'test' do
+    test_against_server { Rake::Task['spec'].invoke }
+  end
 
-desc 'Run EPP specs against server'
-task 'test:epp' do
-  test_against_server { Rake::Task['spec:epp'].invoke }
-end
+  desc 'Run EPP specs against server'
+  task 'test:epp' do
+    test_against_server { Rake::Task['spec:epp'].invoke }
+  end
 
-desc 'Run all but EPP specs'
-RSpec::Core::RakeTask.new('test:other') do |t|
-  t.rspec_opts = '--tag ~epp'
-end
+  desc 'Run all but EPP specs'
+  RSpec::Core::RakeTask.new('test:other') do |t|
+    t.rspec_opts = '--tag ~epp'
+  end
 
-desc 'Run all but EPP specs'
-RSpec::Core::RakeTask.new('test:all_but_features') do |t|
-  t.rspec_opts = '--tag ~feature'
-end
+  desc 'Run all but EPP specs'
+  RSpec::Core::RakeTask.new('test:all_but_features') do |t|
+    t.rspec_opts = '--tag ~feature'
+  end
 
-Rake::Task[:default].prerequisites.clear
-task default: :test
+  Rake::Task[:default].prerequisites.clear
+  task default: :test
 
-def test_against_server
-  stdin, stdout, stderr, wait_thr = Open3.popen3('unicorn -E test -p 8989')
-  pid = wait_thr.pid
-  begin
-    yield
-  ensure
-    `kill #{pid}`
+  def test_against_server
+    stdin, stdout, stderr, wait_thr = Open3.popen3('unicorn -E test -p 8989')
+    pid = wait_thr.pid
+    begin
+      yield
+    ensure
+      `kill #{pid}`
+    end
   end
 end