devops: add more unit-tests for our docker and docker-compose

[gustavovalverde]

Describe the issue or request

We've been making changes to how our Dockerfile and Zebra behaves with other applications, and we should test this integrations when third applications, like lightwalletd must connect to zebra from a different machine/container, as some breaking changes might be introduced without us realizing.

Expected Behavior

We must be notified if third party integrations are being impact by changes in Zebra or Docker

Current Behavior

No information or testing around this subject

Possible Solution

Add a test using our docker-compose, validating the integration with their respective health-checks are working.

Additional Information/Context

No response

Is this happening on PRs?

No response

Is this happening on the main branch?

No response