PM2 Docker Integration

[morganney]

Using docker as the process manager for the containers now, but there is also the option of running pm2 inside the api container.

Want to have this ticket around to remind myself of that.

• https://pm2.keymetrics.io/docs/usage/docker-pm2-nodejs/
• https://stackoverflow.com/questions/51191378/what-is-the-point-of-using-pm2-and-docker-together