add env variable for better working with docker

README.md

@@ -1,9 +1,17 @@
 
 # airodor-wifi
+
 This repository provides two [poetry](https://python-poetry.org/) packages
 1. airodor_wifi_api: this package provides a simple python api to communicate with the limodor/limot airodor wifi module
 2. airodor_web_app: this packages provides a simple flas web app as frontend to the airodor_wifi_api. :warning: This module holds a poetry tool dependency to the airodor_wifi_api. This is currently a workaround to have both packages in one repository and will be resolved in the future.
 
+## use the docker container
+
+you can easily use the docker container provided at dockerhub [benniwi/airodor-wifi](https://hub.docker.com/r/benniwi/airodor-wifi)
+
+Start the container with the environment variable **VENTILATION_ADDRESS** to connect it to your airodor wifi module
+
+
 ## install poetry
 
 ```bash

airodor_web_app/airodor_web_app/app.py

@@ -1,4 +1,5 @@
 import ipaddress
+import os
 import threading
 import time
 from datetime import datetime, timedelta
@@ -8,8 +9,15 @@
 from airodor_wifi_api import airodor
 from flask import Flask, redirect, render_template, request, url_for
 
+env_variable_venilation_address = "VENTILATION_ADDRESS"
 default_IP = ipaddress.ip_address("192.168.2.122")
-current_ip = default_IP
+
+# check if ipadress is given as environment variable
+if env_variable_venilation_address in os.environ:
+    current_ip = ipaddress.ip_address(os.environ[env_variable_venilation_address])
+else:
+    current_ip = default_IP
+
 lock_timer_dict = threading.Lock()
 timer_dict = {"A": airodor.VentilationTimerList(), "B": airodor.VentilationTimerList()}
 timezone = pytz.timezone('Europe/Berlin')