Dockerize individual apps

[AVykhrystyuk]

In development use sym-links, but to build docker image with app use publish + install (inside the docker container) like any other external packages:
lerna/lerna#858 (comment)

"... custom script to be able to deploy a single service":
https://michalzalecki.com/solve-code-sharing-and-setup-project-with-lerna-and-monorepo/

"manual hoisting devDependencies to root" or "lerna exec -- npm prune --production":
lerna/lerna#721 (comment)