Nginx proxy manager configuration

Hi,

I try to configure vikunja with nginx proxy manager. npm is working fine and the website available from the internet. Just the login failed.

Network Error

vikunja is running in docker

version: '3'

services:
  db:
    image: mariadb:10
    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    environment:
      MYSQL_ROOT_PASSWORD: supersecret
      MYSQL_USER: vikunja
      MYSQL_PASSWORD: secret
      MYSQL_DATABASE: vikunja
    volumes:
      - ./db:/var/lib/mysql
    restart: unless-stopped
  api:
    image: vikunja/api
    environment:
      VIKUNJA_DATABASE_HOST: db
      VIKUNJA_DATABASE_PASSWORD: secret
      VIKUNJA_DATABASE_TYPE: mysql
      VIKUNJA_DATABASE_USER: vikunja
      VIKUNJA_DATABASE_DATABASE: vikunja
    ports:
      - 3456:3456
    volumes:
      - ./files:/app/vikunja/files
    depends_on:
      - db
    restart: unless-stopped
  frontend:
    image: vikunja/frontend:unstable
    ports:
      - 10002:80
    environment:
      VIKUNJA_API_URL: http://192.168.178.15:3456/api/v1/
    restart: unless-stopped

@fivetwoseven do you have a running configuration for npm?