This updates the Python version across the Dockerfiles

[giulio-giunta]

Description

Update Python version in Dockerfile/s to solve critical vulnerability issue.

Related Issue

"resolves #613"

Motivation and Context

The Circle ci/cd pipeline failed because Snyk found a critical vulnerability linked to expat/expat, which was introduced by the Python version that is currently used as a base image in the Dockerfile.

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[sonarcloud[bot]]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information