fix: Files moved, docs updated and server updated:

* Moved files around for better consistency
* Simplified docker file for use
* Added a  arg to the server/setup.py script for more flexibility
* Improved the current docker build and compose for the fully patched pritunl.

docker/docker-compose.yml

@@ -11,6 +11,8 @@ services:
         build:
             context: ../server
             dockerfile: ../docker/Dockerfile
+            args:
+                - API_SERVER_DOMAIN=${API_SERVER_DOMAIN:-}
         restart: always
         depends_on:
             - mongodb