Running two server at the same time with a script(Ruby and Rails)

I am new new to Ruby on Rails. In my rails rails application I have used the two servers. One is the rails server and other one is simple ruby server.rb file. I need to start both the server with Start.sh script to deploy.

I have tried the following Code of Start.sh file. But the issue is Rail server is not starting until and unless I stop the ruby server.rb.

start.sh file code

rake ts:stop

rake ts:start

rake ts:index

ruby server.rb

rails server

I want to run both the servers through a single script