Unable to build docker container due to werkzeug 3.1.0 removing Python 2.8 support

[ccben87]

Unable to build docker container due to werkzeug 3.1.0 removing Python 2.8 support. I've also tried updating the Dockerfile at https://github.com/Netflix/lemur-docker/blob/master/lemur-build-docker/Dockerfile to use a custom Docker image of Ubuntu 20.04 as the base image which has Python 2.9 in it but this still fails. To get this to build, I had to edit the requirements.txt and adjust the werkzeug version to 3.0.6. Error log below:

476.8 INFO: pip is looking at multiple versions of lemur to determine which version is compatible with other requirements. This could take a while.
476.8 ERROR: Ignored the following versions that require a different python version: 1.9.0 Requires-Python >=3.9; 2.10.0 Requires-Python >=3.9; 2.10.1 Requires-Python >=3.9; 2.7.0 Requires-Python >=3.9; 2.7.0rc1 Requires-Python >=3.9; 3.0.0 Requires-Python >=3.9; 3.0.1 Requires-Python >=3.9; 3.0.2 Requires-Python >=3.9; 3.1.0 Requires-Python >=3.9; 3.1.1 Requires-Python >=3.9; 3.1.2 Requires-Python >=3.9; 3.1.3 Requires-Python >=3.9; 3.14.0 Requires-Python >=3.9; 3.14.1 Requires-Python >=3.9; 3.23.0 Requires-Python >=3.9; 3.23.1 Requires-Python >=3.9; 3.9.0 Requires-Python >=3.9; 3.9.2 Requires-Python >=3.9
476.8 ERROR: Could not find a version that satisfies the requirement werkzeug==3.1.3 (from lemur) (from versions: 0.1, 0.2, 0.3, 0.3.1, 0.4, 0.4.1, 0.5, 0.5.1, 0.6, 0.6.1, 0.6.2, 0.7, 0.7.1, 0.7.2, 0.8, 0.8.1, 0.8.2, 0.8.3, 0.9, 0.9.1, 0.9.2, 0.9.3, 0.9.4, 0.9.5, 0.9.6, 0.10, 0.10.1, 0.10.2, 0.10.4, 0.11, 0.11.1, 0.11.2, 0.11.3, 0.11.4, 0.11.5, 0.11.6, 0.11.7, 0.11.8, 0.11.9, 0.11.10, 0.11.11, 0.11.12, 0.11.13, 0.11.14, 0.11.15, 0.12, 0.12.1, 0.12.2, 0.13, 0.14, 0.14.1, 0.15.0, 0.15.1, 0.15.2, 0.15.3, 0.15.4, 0.15.5, 0.15.6, 0.16.0, 0.16.1, 1.0.0rc1, 1.0.0, 1.0.1, 2.0.0rc1, 2.0.0rc2, 2.0.0rc3, 2.0.0rc4, 2.0.0rc5, 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.1.0, 2.1.1, 2.1.2, 2.2.0a1, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, 2.3.7, 2.3.8, 3.0.0, 3.0.1, 3.0.2, 3.0.3, 3.0.4, 3.0.5, 3.0.6)
476.9 ERROR: No matching distribution found for werkzeug==3.1.3
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failed to solve: process "/bin/sh -c apt-get update &&     apt-get -y --no-install-recommends upgrade &&     apt-get install -y --no-install-recommends libpq-dev curl build-essential locales libffi-dev libsasl2-dev libldap2-dev         dh-autoreconf git python3-dev python3-pip python3-venv python3-wheel nodejs npm &&     locale-gen en_US.UTF-8 && export LC_ALL=en_US.UTF-8 &&     npm config set registry https://registry.npmjs.org/ &&     npm install npm -g &&     echo \"Running with nodejs:\" && node -v &&     python3 -m venv /opt/venv &&     echo \"Running with python:\" && /opt/venv/bin/python3 -c 'import platform; print(platform.python_version())' &&     /opt/venv/bin/python3 -m pip install --no-cache-dir --upgrade pip setuptools wheel &&     /opt/venv/bin/python3 -m pip install --no-cache-dir -e . &&     npm install --unsafe-perm &&     node_modules/.bin/gulp --cwd /opt/lemur build &&     node_modules/.bin/gulp --cwd /opt/lemur package &&     npm cache clean --force &&     rm -rf node_modules &&     python3 -c 'print(\" \\033[32m BUILDER DONE \\033[0m \")'" did not complete successfully: exit code: 1