ported double tracking from TC

docker/worldserver/Dockerfile

@@ -0,0 +1,9 @@
+FROM ubuntu:20.04
+
+# install the required dependencies to run the authserver
+RUN apt update && apt install -y libmysqlclient-dev libssl-dev libace-6.4.5 libace-dev libreadline-dev net-tools;
+
+HEALTHCHECK --interval=5s --timeout=15s --start-period=30s --retries=3 CMD netstat -lnpt | grep :8085 || exit 1
+
+# run the worldserver located in the directory "docker/worldserver/bin" of the host machine
+CMD ["/azeroth-server/bin/worldserver"]