add Dockerfile and tooling to easily build and run the project

[fbartels]

Hi @huytd,

with this PR users can now easily run the project in a container. The Dockerfile is a multistage build which means the resulting image is quite small since it does not include any build time dependencies.

Through the compose file both building and running is really simple. I have added instructions to the readme.

Fixes #2

Future improvements:

• automatically build Dockerfile and push it to a registry
• once there is a release tag in this repo
  • also tag the image in the registry
  • add a Dockerfile.release which does not build the project, but instead fetches a prebuild release

[fbartels]

Hi @huytd,

I've rebased the pr to resolve the merge conflict.

[huytd]

LGTM. Merging now.

Thank you so much everyone!