Dockerize

This creates an alternative local development workflow from geomag-stacks. I added documentation in /localdev/local_development.md and updated some of the existing documentation.

docs/install.md

 # Installation
 This document describes installation instructions for users. For those that wish to modify or develop custom code within **geomag-algorithms**, or prefer to install the Docker container, please see the following documents:
 > - [Develop](./develop.md) provides installation instruction for developers.
-> - [Docker](./install_docker.md) describes Docker container installation and usage.
+> - [Docker](../localdev/local_development.md) describes Docker container installation and usage.
 
 ## Requirements