This will run pingvin under http://localhost:[port] inside your network

version: "2.1"
services:
  pingvin-share:
    container_name: pingvin-share
    image: stonith404/pingvin-share
    restart: unless-stopped
    ports:
      - [port]:3000
    volumes:
      - /home/[user]/docker/pingvin/data:/opt/app/backend/data

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NOTE:
[user] Corresponds to the folder of you user in your system
[port] The desired port you'd like to map the host