Example docker-compose file to run Joplin server

docker-compose.yml

version: '3'

services:
    app:
        environment:
            - APP_BASE_URL=https://subdomain.example.com
            - APP_PORT=22300
            - POSTGRES_PASSWORD=joplin
            - POSTGRES_DATABASE=joplin
            - POSTGRES_USER=joplin
            - POSTGRES_PORT=5432
            - POSTGRES_HOST=db
            - DB_CLIENT=pg
        restart: unless-stopped
        image: florider89/joplin-server:latest
        networks:
            - internal
            - web
        labels:
            - "traefik.enable=true"
            - "traefik.http.routers.joplin.rule=Host(`subdomain.example.com`)"
            - "traefik.http.routers.joplin.entrypoints=websecure"
            - "traefik.http.routers.joplin.tls=true"
            - "traefik.http.routers.joplin.tls.certresolver=lets-encrypt"
            - "traefik.http.middlewares.sslheader.headers.customrequestheaders.X-Forwarded-Proto = http"
            - "traefik.http.routers.joplin.service=joplin-server"
            - "traefik.http.services.joplin-server.loadbalancer.passhostheader=true"
            - "traefik.http.services.joplin-server.loadbalancer.server.port=22300"
            - "traefik.docker.network=web"
    db:
        restart: unless-stopped
        image: postgres:13.1
        networks:
            - internal
        volumes:
            - /var/postgresql/joplin-data:/var/lib/postgresql/data
        environment:
            - POSTGRES_PASSWORD=joplin
            - POSTGRES_USER=joplin
            - POSTGRES_DB=joplin

    pgbackups:
      container_name: pgbackup
      image: prodrigestivill/postgres-backup-local
      restart: always
      volumes:
        - /server/backup:/backups
      links:
        - db:db
      depends_on:
        - db
      networks:
        - internal
      environment:
        - POSTGRES_HOST=db
        - POSTGRES_DB=joplin 
        - POSTGRES_USER=joplin
        - POSTGRES_PASSWORD=joplin
        - POSTGRES_EXTRA_OPTS=-Z9 --schema=public --blobs
        - SCHEDULE=@daily
        - BACKUP_KEEP_DAYS=7
        - BACKUP_KEEP_WEEKS=4
        - BACKUP_KEEP_MONTHS=6
        - HEALTHCHECK_PORT=81

networks:
  internal:
    internal: true
  web:
    external: true

What would make this really helpful for people who don't do this stuff for a living is a companion configuration for traefik which would work with this one to produce a relatively simple environment in which the joplin server as simple to access.