If you have docker-compose installed, you can simply run from terminal within the project root-directory:
docker-compose up
# OR
docker-compose up -d # to run it detached in background
docker build -t opentripplanner-brb .
docker run -p 80:8080 opentripplanner-brb --router brandenburg --server
Access OpenTripPlanner at http://localhost:80/
.
You can also run with the --analyst option to use OTP Analyst features, or run without any optional arguments to see all available command line options.