Docker example using "official" dashpay/dashd image

dash.conf

# network
testnet=0
listen=1
daemon=0  # leave this set to 0 for Docker
logtimestamps=1
maxconnections=256
debug=0
printtoconsole=1

# optional indices (required for Insight)
txindex=1
addressindex=1
timestampindex=1
spentindex=1

# ZeroMQ notifications (required for Insight)
zmqpubrawtx=tcp://0.0.0.0:29998
zmqpubrawtxlock=tcp://0.0.0.0:29998
zmqpubhashblock=tcp://0.0.0.0:29998

# JSONRPC
server=1
rpcuser=dashrpc
rpcpassword=password
rpcport=9998
rpcallowip=::/0
rpcallowip=0.0.0.0/0
rpcworkqueue=64
rpcthreads=16

docker-compose.yaml

version: '3.3'
services:

  dashcore:
    image: dashpay/dashd:latest
    restart: always
    ports:
      # leave JSONRPC ports exposed for ELB health check
      # (security groups protect these)
      - 9998:9998
      - 19998:9998
      - 9999:9999
      - 19999:9999
      - 127.0.0.1:29998:29998
    user: "0"
    volumes:
      - $PWD/dash.conf:/dash/.dashcore/dash.conf:ro
    command: /usr/local/bin/dashd -conf=/dash/.dashcore/dash.conf