add dockerisation

[rohitagre]

This fork builds upon PR #790 with minor fixes. Thanks @mtozlu

Relevant issues

Contributor checklist

• [x] Provide tests for the changes (unless documentation-only)
• [x] Documented any new features, CLI switches, etc. (if applicable)
  • [x] Server --help output
  • [x] README.md
  • [x] doc/http-server.1 (use the same format as other entries)
• [x] The pull request is being made against the master branch

Maintainer checklist

• [x] Assign a version triage tag
• [x] Approve tests if applicable