Let's try Ubuntu 20.04...
-FROM ubuntu:bionic
+FROM ubuntu:focal
# This env variable makes sure installing the tzdata package doesn't hang in prompt
ENV DEBIAN_FRONTEND=noninteractive
@@ -12,7 +12,7 @@ RUN apt-get update \
git \
libbsd-dev \
doxygen \
- python-sphinx \
+ sphinx-common \
cmake \
ninja-build \
ca-certificates \
