Update Python version to 3.8

Also switch the base image in the Dockerfile to ubi8,
and the base image in .aicoe-ci.yaml to ubi8

.aicoe-ci.yaml

@@ -1,7 +1,7 @@
 check:
  - thoth-build
 build:
- base-image: "registry.access.redhat.com/ubi7/python-36"
+ base-image: "registry.access.redhat.com/ubi8/python-38"
  build-stratergy: "Source"
  registry: "quay.io"
  registry-org: "odh-jupyterhub"

Dockerfile

@@ -1,4 +1,4 @@
-FROM centos/python-36-centos7:latest
+FROM registry.access.redhat.com/ubi8/python-38
 
 LABEL io.k8s.display-name="JupyterHub" \
  io.k8s.description="JupyterHub." \

build-configs/jupyterhub.json

@@ -38,16 +38,15 @@
  "source": {
  "type": "Git",
  "git": {
- "uri": "https://github.com/jupyter-on-openshift/jupyterhub-quickstart.git",
- "ref": "3.4.0"
+ "uri": "https://github.com/opendatahub-io/jupyterhub-quickstart.git"
  }
  },
  "strategy": {
  "type": "Source",
  "sourceStrategy": {
  "from": {
  "kind": "ImageStreamTag",
- "name": "python:3.6",
+ "name": "python:3.8",
  "namespace": "openshift"
  }
  }