Update docker image

Switch to ubuntu:20.04 as a base image
to use python3.8 natively and to support the
latest CVE fixes for python packages

Related-Prod: PROD-36143
Change-Id: I5e1e8fb6d3b4987522a96b621898afd08958fe20
(cherry picked from commit 734246f67621695b367cb5c0bc91d8c6b7e5397a)
4 files changed
tree: 029d51fa275f707c797a5faececb0b8e5718a6f2
  1. bin/
  2. docs/
  3. test_set/
  4. .gitignore
  5. Dockerfile
  6. LICENSE