shim: health endpoint

[pepyakin]

Docker has a feature referred to as HEALTHCHECK. It allows running a predefined command that checks health of the container. It may be a nice-to-have for ops. It is also useful for docker-compose since it allows specifying depends_on for start up order and ideally the demo containers should start only after the shim is up.

[rphmeier]

this could be an RPC added to the shim?

[pepyakin]

Yes. Should be very simple. HEALTHCHECK CMD rawdogging with curl an JSONRPC endpoint works.

[gabriele-0201]

Is this achieved with #191 , as described in #128?

[pepyakin]

No, it's not. The condition for closing this issue is presence of a working integrated healthcheck.