isaacinsoll/picr repository overview

services:
  picr:
    container_name: 'picr'
    image: 'isaacinsoll/picr'
    volumes:
      - <path-to-your-shared-images>:/home/node/app/media:ro # read only access to your 'files i give to clients' folder
      - ./cache:/home/node/app/cache #where PICR will store thumbnails it generates, no need to back it up
    depends_on:
      - db
    ports:
      - "6900:6900" # presumably reverse proxy will handle HTTPS
    environment:
      # - TOKEN_SECRET= # leave this out and on first build it will give you a very secret random string to put in here
      - BASE_URL=https://clients.mysite.com/
      - DATABASE_URL=postgres://user:pass@db/picr
      - USE_POLLING=true
  db:
    image: postgres
    container_name: picr-db
    environment:
      POSTGRES_USER: user
      POSTGRES_PASSWORD: pass
      POSTGRES_DB: picr
    volumes:
      - ./data:/var/lib/postgresql/data #database storage, you should back this up