Riizade/config file (#520)

* added POJO + yaml file

* made config members public

* switched to yaml

* modified files to use YamlConfig over ServerConstants

* removed constants from ServerConstants

* removed unused imports

* removed unused import

* removed world ini

* removed now unused .ini files

* fixed docker-launch.sh

* added jackson dependency JARs

* fixed errors

* removed unused server config values, added world defaults

* don't use env variables for docker

* fixed package imports/specifiers for js files

Dockerfile

@@ -6,4 +6,4 @@ WORKDIR /mnt
 COPY ./ ./
 RUN sh ./posix-compile.sh
 EXPOSE 8484 7575 7576 7577
-CMD exec tini -- sh ./docker-launch.sh
+CMD exec tini -- sh ./posix-launch.sh