Building docker image with CI pipelines

[Razdeep]

All the compiled executable files get packed into single a docker image, which is then published to Dockerhub.
Newcomers don't need to clone, install dependencies, compile now;
instead they can run these simple commands

docker pull jermp/autocomplete
docker run -p 8000:8000 -d jermp/autocomplete

[Razdeep]

@jermp Please add the Dockerhub secrets in the repository settings and rerun the pipeline.

[jermp]

OK, done. Thanks!