Which controversial website is housed in this bomb-proof underground nuclear-shelter-turned-datacenter?

Cracked by: Bipin Banavalikar, vinayaknp, Rogi, Supritha Maiya, Jayaprakash B R, Vishnu Prashanth, Bharath, Anjul, Logik, KK, Dibyo, Sumanth Patlolla, Abhishek Bagchi, Ananth and Manish Achuth