Dockerfile cleanup and initial roc.py

Change-Id: I71dad8b2f75d5a34f8ad66948380f29977c92c33
diff --git a/docker/Dockerfile b/docker/Dockerfile
index b3d5835..cf51c5b 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -17,15 +17,11 @@
 
 RUN apt-get install -y libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-bad1.0-dev gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 gstreamer1.0-pulseaudio
 
-# TODO - is this needed?
-RUN pip3 install paho-mqtt
-
 WORKDIR /var/person-detection-app
 
 COPY . .
 
-RUN . .venv/bin/activate && \
-     pip3 install -r requirements.txt
+RUN pip3 install -r requirements.txt
 
 ENTRYPOINT ["./bin/person_detection.sh"]
 CMD ["-pt 0.75"]