Added config/puma.rb for production deployment

config/puma.rb

@@ -0,0 +1,14 @@
+app_dir = File.expand_path("..", __dir__)
+log_dir = File.join(app_dir, "log")
+pid_dir = "/var/run/game-data"  # or use app_dir + '/tmp/pids' if not using system-wide PID dir
+
+directory app_dir
+pidfile File.join(pid_dir, "puma.pid")
+stdout_redirect File.join(log_dir, "puma.log"), File.join(log_dir, "puma.err.log"), true
+
+environment 'production'
+
+bind 'tcp://0.0.0.0:9292'
+workers 2
+threads 1, 5
+daemonize true