Fix health check on all API containers

Summary

Fix health check on all API services under fonoster.

The checks on all modules were disabled at some point this year due to incompatibility between @grpc/grpc-js and grpc-ts-health-check.

Notes:

• It seems that the latest version has been updated to support @grpc/grpc-js.
• Here is some information about gRPC and health checks https://github.com/grpc/grpc/blob/master/doc/health-checking.md
• Every service has a healthcheck.ts file to take care of the health check. See example.

Intended Outcome

All gRPC and non-gRPC modules implement health checks.

Requirements

We must fix checks in the following modules.

• Agents
• Apps
• Auth
• Callmanager
• Domains
• Funcs
• Limiter
• Monitor
• Numbers
• Projects
• Providers
• Secrets
• Storage
• Users
• Voice (non gRPC service)

[psanders]

I check the PR, and everything looks great. Can you try the last build at staging?

[psanders]

@efraa

I saw you created a cloned and cleaned the grpc-ts-health-check packages.

I renamed the project to grpc-health-check.

Can we update the package name to @fonoster/grpc-health-check.

Also, we need to reference the original authors somewhere in the README.