Restarts every other minute
These are the logs:
```
Nov 02 17:15:39 nitter[9181]: Starting Nitter at http://bird.trom.tf
Nov 02 17:15:39 nitter[9181]: Connected to Redis at localhost:6379
Nov 02 17:18:22 nitter[9181]: asyncfutures.nim(372)    read
Nov 02 17:18:22 nitter[9181]: asyncfutures.nim(420)    asyncCheckCallback
Nov 02 17:18:22 nitter[9181]: Error: unhandled exception: Too many open files [OSError]
Nov 02 17:18:22 systemd[1]: nitter.service: Main process exited, code=exited, status=1/FAILURE
Nov 02 17:18:22 systemd[1]: nitter.service: Failed with result 'exit-code'.
Nov 02 17:18:37 systemd[1]: nitter.service: Service RestartSec=15s expired, scheduling restart.
Nov 02 17:18:37 systemd[1]: nitter.service: Scheduled restart job, restart counter is at 13.
Nov 02 17:18:37 systemd[1]: Stopped Small description of the service.
Nov 02 17:18:37 systemd[1]: Started Small description of the service.
Nov 02 17:18:37 nitter[12342]: Starting Nitter at http://bird.trom.tf
Nov 02 17:18:37 nitter[12342]: Connected to Redis at localhost:6379
Nov 02 17:20:11 nitter[12342]: ERROR strutils.nim(1315)       parseEnum
Nov 02 17:20:11 nitter[12342]: asyncfutures.nim(372)    read
Nov 02 17:20:11 nitter[12342]: Invalid enum value: newsletter_issue
Nov 02 17:21:28 nitter[12342]: asyncfutures.nim(372)    read
Nov 02 17:21:28 nitter[12342]: asyncfutures.nim(420)    asyncCheckCallback
Nov 02 17:21:28 nitter[12342]: Error: unhandled exception: Too many open files [OSError]
Nov 02 17:21:28 systemd[1]: nitter.service: Main process exited, code=exited, status=1/FAILURE
Nov 02 17:21:28 systemd[1]: nitter.service: Failed with result 'exit-code'.
Nov 02 17:21:43 systemd[1]: nitter.service: Service RestartSec=15s expired, scheduling restart.
Nov 02 17:21:43 systemd[1]: nitter.service: Scheduled restart job, restart counter is at 14.
Nov 02 17:21:43 systemd[1]: Stopped Small description of the service.
Nov 02 17:21:43 systemd[1]: Started Small description of the service.
Nov 02 17:21:44 nitter[15436]: Starting Nitter at http://bird.trom.tf
Nov 02 17:21:44 nitter[15436]: Connected to Redis at localhost:6379
Nov 02 17:22:42 systemd[1]: Stopping Small description of the service...
Nov 02 17:22:42 systemd[1]: nitter.service: Main process exited, code=killed, status=15/TERM
Nov 02 17:22:42 systemd[1]: nitter.service: Succeeded.
Nov 02 17:22:42 systemd[1]: Stopped Small description of the service.
Nov 02 17:22:42 systemd[1]: Started Small description of the service.
Nov 02 17:22:42 nitter[16002]: Starting Nitter at http://bird.trom.tf
Nov 02 17:22:42 nitter[16002]: Connected to Redis at localhost:6379
```

Seems that the `Error: unhandled exception: Too many open files [OSError]` may be at fault?