adding config file for MariaDB

* was getting issues with connecting to running docker container
  through the SQL port (5506->3306), changing config option fixed
  the issue

See: https://forums.docker.com/t/solved-unclear-behaviour-of-a-mysql-container-running-with-docker-for-mac-1-12-0-a/20331

server/docker/Dockerfile

@@ -64,7 +64,8 @@ RUN \
   cp -f /home/bus/popufare/server/scripts/RideLogic.pm /usr/share/perl5 && \
   cp -f /home/bus/popufare/server/scripts/RideLogicDBI.pm /usr/share/perl5 && \
   cp -f /home/bus/popufare/server/scripts/RideLogicACL.pm /usr/share/perl5 && \
-  cp -f /home/bus/popufare/server/scripts/RideLogicAPIQueryWrapper.pm /usr/share/perl5
+  cp -f /home/bus/popufare/server/scripts/RideLogicAPIQueryWrapper.pm /usr/share/perl5 && \
+  cp -f /home/bus/popufare/server/config/etc/mysql/mariadb.conf.d/50-server.cnf /etc/mysql/mariadb.conf.d/50-server.cnf
 
 # main startup scripts
 #