Sonatype Nexus3 – Docker compose

version: '3'
services:
  jenkins:
    image: sonatype/nexus3:3.29.0
    user: root:root
    restart: always
    container_name: nexus
    environment:
      TZ: "Asia/Kolkata"
    volumes:
      - /opt/nexus-data:/nexus-data
    ports:
      - 8081:8081

Get admin passwords:

docker exec -it nexus bash

find / -iname admin.*

#OR

docker exec -it nexus  cat /nexus-data/admin.password

More : https://hub.docker.com/r/sonatype/nexus3#user-content-persistent-data