Ruby website site is down in Bangladesh

This is Sayed Mohammad Ehsan From Bangladesh. I am a ruby on rails developer. Yesterday when i was tried to install rails on my ubuntu 20 it was showing error. and after few discussion with my friend i have find that ruby site is down here. I have talked with my ISP, and they are also unknown about the fact.
you can check this from the following link.

Can any one please tell me where is the problem?

Thank you