added versioncheck

main.py

@@ -6,6 +6,7 @@ from os import environ #Used for getting the enviorement variables
 from itsdangerous import URLSafeSerializer #used for signing the cookies
 from random import choice#used for signing the cookies
 from string import ascii_lowercase #used for signing the cookies 
+from requests import get #used to get the current version on the Server
 
 #Import of shorter specific files
 from table_check import table_check #import the table check file
@@ -197,6 +198,9 @@ def apiDocs():
     
 def startup():
     table_check()# This code checks whether database table is created or not
+    versionServer = get("https://gitlab.jonasled.de/jonasled/url_shorter_docker/raw/master/VERSION").text
+    if(open("VERSION", "r").read() != versionServer): print("Different version on the server found. Your version: " + open("VERSION", "r").read() + ", server version: " + versionServer + ".")
+
     if production: #Check if production variable is set to true use the waitress webserver, else use the buildin flask webserver, with more debug output
         serve(app, host=host, port= 5000, url_scheme=url_scheme) #Start the Webserver for all users on port 5000
     else: