Update Docker file

[verovaleros]

Description

This PR includes changes to etc/docker/Dockerfile and etc/docker/entrypoint.sh:

• Optimises layering of the docker image
• Updates base image to Python 3.12
• Removes hardcoded paths
• Updates Conda installation
• Removes need of installing packages with apt in an attempt to reduce the size of the container

Fixes #34

How Has This Been Tested?

• Image was rebuilt and AIP was run successfully on Zeek data
• Resulting blocklists were generated without errors

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings