It's a mistake to run on only one dyno. You need at least two to enable the autoscaling feature and your single dyno cycles (reboots) once a day, which is creating downtime you probably didn't know about.
Unless it's a hobby site offering a free service, which this seems to be.
Projects like this are awesome, and the barrier to making them should be low — gatekeeping by the community like this project needs to have a five nines SLA is frankly counterproductive.
Thanks :)