make listener robust to bad data

scheduler/Dockerfile

@@ -5,4 +5,4 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY scheduler/ ./scheduler
 COPY models/ ./models
 ENV PYTHONPATH=/app
-CMD ["python", "scheduler/scheduler.py"]
+CMD ["python", "-m", "scheduler.scheduler"]

scheduler/scheduler.py

@@ -2,7 +2,7 @@
 
 import os
 import logging
-from db_utils import get_active_events
+from .db_utils import get_active_events
 import paho.mqtt.client as mqtt
 import json
 import datetime