Deploy Vikunja behind lucaslorentz/caddy-docker-proxy

docker-compose.yml

version: '3'

services:
  api:
    image: vikunja/api
    environment:
      VIKUNJA_DATABASE_HOST: db
      VIKUNJA_DATABASE_PASSWORD: password
      VIKUNJA_DATABASE_TYPE: mysql
      VIKUNJA_DATABASE_USER: vikunja
      VIKUNJA_DATABASE_DATABASE: vikunja
      VIKUNJA_MAILER_ENABLED: "true"
      VIKUNJA_MAILER_HOST: 192.168.1.1
      VIKUNJA_MAILER_PORT: 25
      VIKUNJA_MAILER_USERNAME: ''
      VIKUNJA_MAILER_PASSWORD: ''
      VIKUNJA_MAILER_SKIPTLSVERIFY: "true"
      VIKUNJA_MAILER_FROMEMAIL: vikunja@domain.com
      VIKUNJA_LOG_MAIL: "on"
      VIKUNJA_SERVICE_JWTSECRET: supersecret
      VIKUNJA_SERVICE_FRONTENDURL: https://vikunja.domain.com/

    volumes:
      - ./files:/app/vikunja/files
    networks:
      - caddy
    depends_on:
      - db
    restart: unless-stopped
    labels:
      caddy: vikunja.domain.com
      caddy.reverse_proxy: /api/* "{{upstreams 3456}}"
      caddy.reverse_proxy_1: /dav/* "{{upstreams 3456}}"
      caddy.reverse_proxy_2: /.well-known/* "{{upstreams 3456}}"
      caddy.tls: data/caddy/certs/domain.com.crt data/caddy/certs/domain.com.key
  frontend:
    image: vikunja/frontend
    labels:
      caddy: vikunja.domain.com
      caddy.reverse_proxy: "{{upstreams 80}}"
      caddy.tls: data/caddy/certs/domain.com.crt data/caddy/certs/domain.com.key 
    networks:
      - caddy
    restart: unless-stopped
  db:
    image: mariadb:10
    command: --character-set-server=utf8mb4 --collation-server=utf8mb4_unicode_ci
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_USER: vikunja
      MYSQL_PASSWORD: password
      MYSQL_DATABASE: vikunja
    volumes:
      - ./db:/var/lib/mysql
    networks:
      - caddy
    restart: unless-stopped
    command: --max-connections=1000

networks:
  caddy:
    external: true

#networks:
#  web:
#    external: true