create snake builder to select snake from a .env file

server/SnakeBuilder.py

@@ -0,0 +1,7 @@
+
+class SnakeBuilder:
+  @classmethod
+  def build(self, selected_snake:str):
+    snake_module = __import__(f'snakes.{selected_snake}', fromlist=[selected_snake])
+    snake_class = getattr(snake_module, selected_snake)
+    return snake_class()