Create and config a docker registry with Nexus

TODO

• store all docker files on that
  • all simulation images
  • evaluation
    • evaluation-rest
    • evaluation-tester
    • evaluation-frontend
    • mysql
    • influxdb
    • pometheus
    • grafana
    • rabbit-mq
  • git sync
• build and push to this repo
  • simulations
  • evaluation