Clean up old files

Changelog:
* Move Postgres database creation for testing from build scripts into it's own file and call the functions
* Link Boost libraries directly for Phobos
* Update CI to change the name of the docker image to upload
* Delete CMakeLists.txt, ci.Dockerfile, old build and install scripts, old subtree pull scripts because they are deprecated
* Add helpful files for development: Dockerfile, envs.list, start-db.sh
* Update the Readme to the new changes