Reintroduce alpine to the sbtc service.

[CAGS295]

Summary of Changes

Replace bookworm base image with alpine. Follow up on #294
Image size is down to 341MB from 900ish.

Testing

Up the services and inspect the sbtc container deploying contracts successfully.

Risks

How were these changes tested?

What future testing should occur?

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented on my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[friedger]

LGTM