Add caddy reverse proxy as an option in docker-compose

[sinamics]

Thanks to @n9yty for the template in #297

New docker-compose layout:

services:
  postgres:
    image: postgres:15.2-alpine
    container_name: postgres
    restart: unless-stopped
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: ztnet
    volumes:
      - postgres-data:/var/lib/postgresql/data
    networks:
      - app-network

  zerotier:
    image: zyclonite/zerotier:1.14.0
    hostname: zerotier
    container_name: zerotier
    restart: unless-stopped
    volumes:
      - zerotier:/var/lib/zerotier-one
    cap_add:
      - NET_ADMIN
      - SYS_ADMIN
    devices:
      - /dev/net/tun:/dev/net/tun
    networks:
      - app-network
    ports:
      - "9993:9993/udp"
    environment:
      - ZT_OVERRIDE_LOCAL_CONF=true
      - ZT_ALLOW_MANAGEMENT_FROM=172.31.255.0/29

  ztnet:
    image: sinamics/ztnet:latest
    container_name: ztnet
    working_dir: /app
    volumes:
      - zerotier:/var/lib/zerotier-one
    restart: unless-stopped
    ports:
      - 3000:3000
    # - 127.0.0.1:3000:3000  <--- Use / Uncomment this line to restrict access to localhost only
    environment:
      POSTGRES_HOST: postgres
      POSTGRES_PORT: 5432
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: ztnet
      NEXTAUTH_URL: "http://localhost:3000" # !! Important !! Set the NEXTAUTH_URL environment variable to the canonical URL or IP of your site with port 3000
      NEXTAUTH_SECRET: "random_secret"
      NEXTAUTH_URL_INTERNAL: "http://ztnet:3000" # Internal NextAuth URL for 'ztnet' container on port 3000. Do not change unless modifying container name.
    networks:
      - app-network
    links:
      - postgres
    depends_on:
      - postgres
      - zerotier

  ############################################################################
  #                                                                          #
  # Uncomment the section below to enable HTTPS reverse proxy with Caddy.    #
  #                                                                          #
  # Steps:                                                                   #
  # 1. Replace <YOUR-PUBLIC-HOST-NAME> with your actual public domain name.  #
  # 2. Uncomment the caddy_data volume definition in the volumes section.    #
  #                                                                          #
  ############################################################################

  # https-proxy:
  #   image: caddy:latest
  #   container_name: ztnet-https-proxy
  #   restart: unless-stopped
  #   depends_on:
  #     - ztnet
  #   command: caddy reverse-proxy --from <YOUR-PUBLIC-HOST-NAME> --to ztnet:3000
  #   volumes:
  #     - caddy_data:/data
  #   networks:
  #     - app-network
  #   links:
  #     - ztnet
  #   ports:
  #     - "80:80"
  #     - "443:443"

volumes:
  zerotier:
  postgres-data:
  # caddy_data:

networks:
  app-network:
    driver: bridge
    ipam:
      driver: default
      config:
        - subnet: 172.31.255.0/29