Fixed rubocop warnings

src/appinfo.rb

@@ -1,3 +1,7 @@
+# frozen_string_literal: true
+
 module AppInfo
+
   VERSION = '0.1.0'
+
 end

src/helpers.rb

@@ -3,11 +3,11 @@
 # Helpers - view helper functions
 module Helpers
 
-  def ruby_version()
+  def ruby_version
     return RUBY_VERSION
   end
 
-  def app_version()
+  def app_version
     return AppInfo::VERSION
   end
 

src/server.rb

@@ -5,7 +5,7 @@ require 'sinatra/json'
 require 'sequel'
 require 'sqlite3'
 
-require_relative './appinfo'
+require_relative 'appinfo'
 
 # Load the Sequel timestamps plugin
 Sequel::Model.plugin(:timestamps)