No Indy.js meetup for December. Instead, you should go to the 7th Annual Indy Hackers Holiday Social! Celebrate the year with your fellow hackers over food and drink! Free, awesome, organized by the great people at http://indyhackers.org .
Note: be sure to register (https://www.eventbrite.com/e/indy-hackers-holiday-social-2018-8th-bit-edition-tickets-49984441811). Even though the event is free, you'll still need a ticket!