Make node api work and add node version

[shrimalmadhur]

Why are these changes needed?

localhost is loopback url so we should not provide it as address to http server when we want to access from docker container. We can just provide the :port and it will be accessible

• Also added DA node version

Checks

• I've made sure the lint is passing in this PR.
• I've made sure the tests are passing. Note that there might be a few flaky tests, in that case, please comment that they are not relevant.
• Testing Strategy
  • Unit tests
  • Integration tests
  • This PR is not tested :(

[ian-shim]

lgtm
how has this been tested?

[shrimalmadhur]

lgtm how has this been tested?

I used my preprod node and deployed this version (before changing semvar)

ubuntu@ip-172-31-21-228:~/eigenda-operator-setup$ curl http://localhost:9091/eigen/node
{"node_name":"da-node","node_version":"0.0.1","spec_version":"v0.0.1"}

We need to change the operator setup repo so that the nodeapi port is open to internet