feat(docker): Update Docker Compose setup to Node 20

[evan10s]

This doesn't seem to affect functionality at all and helps us keep up with the latest Node LTS release.

• [x] Docker images run successfully locally when built from Node 20 image

Closes #76

[github-actions[bot]]

:tada: This PR is included in version 2.1.0 :tada:

The release is available on:

• GitHub release
• v2.1.0

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