Move to idiomatic javascript project structure

[Kjetil Mehl]

Suggest we move files to this structure:

├── src
│   ├── proxy.ts
│   └── ...files.ts
├── .dockerignore
├── .gitignore
├── .npmignore
├── Dockerfile
├── docker-compose.yml
├── package.json
└── REAME.md

Main reason for this is that it's a more idiomatic approach of structuring a Javascript project. Nice bonus is that we can stop running npm and docker with ---prefix/context.

[Joohansson (Json)]

Sure sounds good to me, as long as we update any references in the readme