HumHub on Linode

version: '2'
services:
  humhub:
    image: mriedmann/humhub:latest
    links:
      - db:db
    depends_on:
      - db
    ports:
      - 80:80
    volumes:
      - /home/docker/humhub/config:/var/www/localhost/htdocs/protected/config
      - /home/docker/humhub/uploads:/var/www/localhost/htdocs/uploads
      - /home/docker/humhub/modules:/var/www/localhost/htdocs/protected/modules
    environment:
      HUMHUB_DB_USER: humhub
      HUMHUB_DB_PASSWORD: humhub

  db:
    image: mariadb:10.2
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: humhub
      MYSQL_USER: humhub
      MYSQL_PASSWORD: humhub

When installing you'll probably get a permissions issue. Here's how I fixed it.

cd /home/docker/humhub

chmod 777 -R uploads