message: Pin docker source image version
diff: # Use this for local development on intel machines
  -# FROM resin/amd64-alpine-python:3.6-slim
  +# FROM resin/amd64-alpine-python:3.6-slim-20180123
  # Use this for running on a robot
  -FROM resin/raspberrypi3-alpine-python:3.6-slim
  +FROM resin/raspberrypi3-alpine-python:3.6-slim-20180120
  # TODO (artyom, 20171205): remove this and set all relevant environment
  # variables (such as APP_DATA_DIR) explicitly
  