Fix Puma plugin entry point issue

Author: bopm

lib/puma/plugin/tailwindcss.rb

@@ -13,7 +13,7 @@ def start(launcher)
       # If we use system(*command) instead, IRB and Debug can't read from $stdin
       # correctly bacause some keystrokes will be taken by watch_command.
       begin
-        IO.popen(Tailwindcss::Commands.watch_command, 'r+') do |io|
+        IO.popen(['bin/rails', 'tailwindcss:watch'], 'r+') do |io|
           IO.copy_stream(io, $stdout)
         end
       rescue Interrupt