Update forbidden strings

Attempted to implement a fix for this: https://huggingface.co/spaces/discord-community/HuggingMod/discussions/5

app.py

@@ -68,8 +68,10 @@ async def on_message(message):
             """Antispam"""
             #Detecting certain unwanted strings
             try:
-                forbidden_strings = ["@everyone", "@here"]
-                if any(string.lower() in message.content.lower() for string in forbidden_strings):
+                forbidden_patterns = [r"@everyone", 
+                                      r"@here", 
+                                      r"(https?:\/\/|http?:\/\/)?(www.)?(discord.(gg|io|me|li)|discordapp.com\/invite|discord.com\/invite)\/[^\s\/]+?(?=\b)"]
+                if any(re.search(pattern, message.content, re.IGNORECASE) for pattern in forbidden_patterns):
                     ignored_role_ids = [897381378172264449, 897376942817419265] #admins, huggingfolks
                     if any(role.id in ignored_role_ids for role in message.author.roles):
                         if message.author != lunarflu: