[INF-80] Add health check to Dockerfile

[cheran-senthil]

Description

Installs curl and adds a health check to the Dockerfile directly so that we don't need to have health checks managed by docker-compose

Tests

Tested by bringing up the docker container

ubuntu@cheran-gcp:~$ docker ps | grep healthy
30fc8d0c274d   cn1_creator-node                                                              "bash scripts/start.…"   About a minute ago   Up About a minute (healthy)   0.0.0.0:4000->4000/tcp, :::4000->4000/tcp, 0.0.0.0:9230->9230/tcp, :::9230->9230/tcp               cn1_creator-node_1
ffbab9abfc3d   dn1_web-server                                                                "bash scripts/start.…"   3 minutes ago        Up 3 minutes (healthy)        0.0.0.0:5000->5000/tcp, :::5000->5000/tcp                                                          dn1_web-server_1
ed3fea2045e5   postgres:11.1                                                                 "docker-entrypoint.s…"   3 minutes ago        Up 3 minutes (healthy)        0.0.0.0:5432->5432/tcp, :::5432->5432/tcp

How will this change be monitored? Are there sufficient logs?

[vicky-g]

should we be doing this for identity too?