Your husband would have to complete certain forms for the newborn, book an appointment and submit the forms to the nearest Canadian high commission:
https://www.international.gc.ca/country-pays/india-inde/new_delhi-info.aspx?lang=eng#CS
Btw, what do you mean limited resources? Time or money or family support? There are other complications such as whether newborn use Canadian passport or Indian passport to exit India.