docker: add health check

[aramikm]

Goal

The goal of this PR is to add health check to docker images

Closes #1390

Discussion

• Using the already existed script written by Puneet
• another alternative is to use something like the following

HEALTHCHECK --interval=300s --timeout=75s --start-period=30s --retries=3 \
  CMD curl -f http://localhost:9944/health || exit 1