Install nginx on acceptance spec test container instead of apache to speed things up

spec/Vagrantfile

@@ -29,5 +29,5 @@ Vagrant.configure("2") do |config|
 
   config.vm.network :forwarded_port, guest: 80, host: 8080
   config.vm.provision :shell,
-    inline: 'sudo apt-get install apache2 -y'
+    inline: 'sudo apt-get install nginx -y && sudo service nginx start'
 end

spec/acceptance/sanity_check_spec.rb

@@ -36,7 +36,7 @@ describe 'Sanity check' do
 
     it 'forwards configured ports' do
       output = `curl -s localhost:8080`.strip.chomp
-      expect(output).to include 'It works!'
+      expect(output).to include 'Welcome to nginx!'
     end
   end