Invalid CSRF token with Docker Compose setup

[cb3inco]

I'm having a slightly similar problem to this issue: #397

I just setup Wallabag with docker compose as follows:

services:
  wallabag:
    image: wallabag/wallabag
    container_name: wallabag-server
    env_file: ./wallabag.env
    volumes:
      - ./data/app/images:/var/www/wallabag/web/assets/images
    networks:
      - traefik
      - wallabag
    restart: unless-stopped
    labels:
      - "diun.enable=true"

      - "traefik.enable=true"
      - "traefik.docker.network=traefik"
      - "traefik.http.routers.wallabag.rule=Host(`wallabag.example.com`)"
      - "traefik.http.routers.wallabag.entrypoints=https"
      - "traefik.http.routers.wallabag.tls.certResolver=letls"
    healthcheck:
      test: ["CMD", "wget" ,"--no-verbose", "--tries=1", "--spider", "http://localhost/api/info"]
      interval: 1m
      timeout: 3s
    depends_on:
      - db
      - redis
  db:
    image: mariadb
    container_name: wallabag-db
    restart: unless-stopped
    env_file: ./wallabag.env
    volumes:
      - ./data/db:/var/lib/mysql
    healthcheck:
      test: ["CMD", "mysqladmin" ,"ping", "-h", "localhost"]
      interval: 20s
      timeout: 3s
    networks:
      - wallabag
    labels:
      - "diun.enable=true"
  redis:
    image: redis:alpine
    container_name: wallabag-redis
    restart: unless-stopped
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 20s
      timeout: 3s
    networks:
      - wallabag
    labels:
      - "diun.enable=true"
networks:
  traefik:
    external: true
    name: traefik
  wallabag:
    external: true
    name: wallabag

I can log in with the default wallabag username and password (with no Invalid CSRF Token), I created another account, signed out and attempted to sign in, but get: Invalid CSRF Token. It goes back to the log in page. However, if a go to https://wallabag.example.com/quickstart - my new user is signed in.

My setup is behind Cloudflare.