broken Docker build

[rfulwell]

Describe the bug
The Docker build is broken due to an unsupported base image.

To Reproduce

1. per the docs, git clone https://github.com/mitre/caldera.git --recursive
2. cd caldera
3. docker-compose build

Expected behavior
Successful Docker build.

Screenshots

Desktop (please complete the following information):

• OS: WSL2/Ubuntu
• Browser: N/A
• Version: latest default branch (5.0.0)

Additional context
Note the FROM: line at the top of the file specifies Ubuntu 23.04.
That version is no longer supported: https://endoflife.date/ubuntu

I recommend this project move to the latest available LTS version (Ubuntu 24.04). I'll open up a PR to do that and reference this issue.

[github-actions]

Looks like your first issue -- we aim to respond to issues as quickly as possible. In the meantime, check out our documentation here: http://caldera.readthedocs.io/

[rfulwell]

btw, there's a straightforward Docker one-liner to repro the problem locally:

docker run ubuntu:23.04 apt-get update