Allow setting a custom address / hostname for web app

[haecker-felix]

I'm using deconz-docker image with Traefik as reverse proxy.

  deconz:
    image: "marthoc/deconz"
    restart: "unless-stopped"
    volumes:
      - "deconz:/root/.local/share/dresden-elektronik/deCONZ"
    devices:
      - "/dev/ttyACM0"
    environment:
      - "DECONZ_WEB_PORT=8080"
      - "DECONZ_WS_PORT=443"
      - "DECONZ_DEVICE=/dev/ttyACM0"
      - "TZ=Europe/Berlin"
      - "DEBUG_INFO=1"
      - "DEBUG_APS=0"
      - "DEBUG_ZCL=0"
      - "DEBUG_ZDP=0"
      - "DEBUG_OTAU=0"
    labels:
      - "traefik.enable=true"
      - "traefik.http.routers.deconz.rule=Host(`deconz.haeckerfelix.de`)"
      - "traefik.http.routers.deconz.entrypoints=websecure"
      - "traefik.http.routers.deconz.tls=true"
      - "traefik.http.services.deconz.loadbalancer.server.port=8080"
    networks:
      web:
        ipv4_address: "172.18.0.5"

By default the web app only finds the service with the docker internal network ip address 172.18.0.5 which you cannot use (login / clicking on the gateway tile does nothing)

I found this workaround though:

• Open Firefox inspector
• Click on Web-Storage tab
• Click on local storage
• Replace IP address with traefik / "external" dns name

I changed this

to this

... and I was able to use the web app through my traefik reverse proxy! :tada:

Therefore I wonder

• if we can add an input entry or something on the gateway page to enter a custom address?
• if we can configure a custom address directly? (eg. by setting a docker env variable like DECONZ_ADDRESS=deconz.haeckerfelix.de), so we don't need any workaround?