msobczyk/handle signals in docker entrypoint

handle signals in docker entrypoint, handle exit in start_clive script (close container on terminal close), closes issue #274 (closed)

clive/__private/core/accounts/account_manager.py

@@ -198,13 +198,19 @@ class AccountManager:
         if not self.has_working_account:
             first_account_to_add = to_add[0]
             self.set_working_account(first_account_to_add)
+            if not self.is_account_known(first_account_to_add):
+                self.known.add(first_account_to_add)
             to_add = to_add[1:]
 
         # raise AccountAlreadyExistsError if any of the accounts is already a working account
+        # add the account to the known list if it does not already exist there
         for account in to_add:
             if self.is_account_working(account):
                 raise AccountAlreadyExistsError(Account.ensure_account_name(account), "WorkingAccount")
 
+            if not self.is_account_known(account):
+                self.known.add(account)
+
         self.watched.add(*to_add)
 
     def remove_tracked_account(self, *to_remove: str | Account) -> None: