Fix dockerfile and python

app/monitor-planning.py

@@ -21,7 +21,9 @@ search_num_weeks = 1
 reset_table = False
 
 web_opts = webdriver.ChromeOptions()
+web_opts.add_argument('--no-sandbox')
 web_opts.add_argument('--headless')
+web_opts.add_argument('--disable-dev-shm-usage')
 
 def notify(title, message):
     api_url = 'https://hass.jennett-wheeler.co.uk/api/webhook/-Qx6jHsGLHwbBlJpLek5Nj8qS'