Fix missing fonts in Docker image (#79)

* Add tzdata package to allow for specifying the timezone used for the timestamps

* Add fonts-freefont-ttf package so the required font is available for the timestamps

Dockerfile

@@ -1,12 +1,12 @@
 FROM python:3
 
 ARG DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install -y ffmpeg && apt-get autoremove && apt-get clean
+RUN apt-get update && apt-get install -y ffmpeg tzdata fonts-freefont-ttf && apt-get autoremove && apt-get clean
 
 
 WORKDIR /usr/src/app/tesla_dashcam
 ADD . .
 RUN pip install -r requirements.txt
 ENV PYTHONUNBUFFERED=true
 
-ENTRYPOINT [ "python", "tesla_dashcam/tesla_dashcam.py" ]
+ENTRYPOINT [ "python", "tesla_dashcam/tesla_dashcam.py" ]