bump to Python 3.7 image
-FROM python:3.6-slim as python_builder
+FROM python:3.7-slim as python_builder
RUN apt-get update -qq && \
apt-get install -y --no-install-recommends \
build-essential \
@@ -19,7 +19,7 @@ RUN python -m venv /opt/venv && \
poetry install --no-dev --no-interaction
# start a new build stage
-FROM python:3.6-slim
+FROM python:3.7-slim
# copy everything from /opt
COPY --from=python_builder /opt/venv /opt/venv
