Nexus3 image which extends sonatype/nexus3 image. It fixes problem with setting heap size for Nexus.
To run image with default 1200 MB of memory use, it is not neccessary to use any arguments. For using different heap size, add arguments -e JAVA_MIN_MEM=128m and -e JAVA_MAX_MEM=256m.
docker run -d -p 8081:8081 --name nexus -e JAVA_MIN_MEM=128m -e JAVA_MAX_MEM=256m martinhorava/nexus3:latest
docker build --rm -t martinhorava/nexus3:latest .