How to launch a website

no it will not come under any law, if you need to start with your friends first put patnership deed and register under company law

incorporate a company by registering under the Register of companies. For details i refer you to go thru www.mca.gov.in where you would get details perrtaining to incorporation of company and filing certain forms with ROC. Consult a lawyer/CA firm as they deal with company matters.

• It is your choice to firm , the Partnership Firm, or
• Company, like Private Limitied Co.,  or Public Limited Co.,  if you want to pool the money from public , you have to opt for Public Limited Company, and it should be registered with the Company's registerar.
• Partnership Firm registeration is with the Sales Tax Department of the concerned state.
• Both the Partnership Firm, Sole Proprietor and Companies are covered to Indian Income Tax Act.