update settings for smooth deploy to heroku

bot/config.py

@@ -1,13 +1,5 @@
-from urllib.parse import urljoin
 import os
-
-try:
-    with open('token.txt') as f:
-        BOT_API_TOKEN = f.readline().strip()
-except:
-    BOT_API_TOKEN = os.getenv('BOT_API_TOKEN')
-
-assert BOT_API_TOKEN
+from secrets import token_urlsafe
 
 with open('messages/start.txt') as f:
     START_MESSAGE = f.read()
@@ -18,20 +10,20 @@
 with open('messages/code.txt') as f:
     CODE_INFO = f.read()
 
-PROJECT_SUBDOMAIN = os.getenv('APP_NAME')
-DOMAIN = os.getenv('DOMAIN')
 
-# webhook settings
-WEBHOOK_HOST = f'https://{PROJECT_SUBDOMAIN}.{DOMAIN}.com'
-WEBHOOK_PATH = '/webhook/' + BOT_API_TOKEN[::-1]
-WEBHOOK_URL = urljoin(WEBHOOK_HOST, WEBHOOK_PATH)
+API_TOKEN = os.getenv('API_TOKEN')
+assert API_TOKEN
 
+HEROKU_APP_NAME = os.getenv('HEROKU_APP_NAME')
+assert HEROKU_APP_NAME
 
-# webapp settings
-WEBAPP_HOST = '*'
-# WEBAPP_PORT = os.getenv('PORT')
-WEBAPP_PORT = 8443
+webhook_secret = token_urlsafe(32)
+
+# webhook settings
+WEBHOOK_HOST = f'https://{HEROKU_APP_NAME}.herokuapp.com'
+WEBHOOK_PATH = f'/webhook/{webhook_secret}'
+WEBHOOK_URL = f'{WEBHOOK_HOST}{WEBHOOK_PATH}'
 
-# way to run
-METHOD = os.getenv('METHOD', 'polling')
-# METHOD can be `polling` or `webhook`
+# webserver settings
+WEBAPP_HOST = '0.0.0.0'
+WEBAPP_PORT = int(os.getenv('PORT'))