added a task for stopping and starting rails

lib/tasks/server.rake

@@ -0,0 +1,17 @@
+namespace :server do
+     
+     desc "Start Rails"
+     task :start do
+       sh("rails s -d")
+     end
+     
+     desc "Stop Rails"
+     task :stop do
+        pid_file = "tmp/pids/server.pid"
+        if File.exists?(pid_file)
+          Process.kill("INT", File.read(pid_file).to_i)
+        else
+          puts "[-] Server isn't running"
+        end
+     end
+end