Provide build instructions and Docker image

Summary:
The Makefile is compatible with GNU and BSD Makefile.

The Docker image is created using multi-stage builds,
one image to build the Rust source code, one to run the software.

Test Plan:

• make all
• make install
• docker build .
• run fantoir-datasource <fetch/import> from a Docker container

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D3282