You can copy your own license into the volume /license of the Tamino container.
Make sure the license file has the same owner id and group id as the user that runs the database in the docker container. By default this is 1724:1724.
Mount the license file into the directory /license at the new container via
docker run -d -p 3250:3250 -v <licensefile.xml>:/licenses/<licensefile.xml> taminoimage
.
Start a shell inside the Tamino container with docker exec -it inocontainer /bin/bash
.