fix(backend_server.py): fix server waiting for closed socket to dissapear by reusing it in __init__()

src/judas_server/backend/backend_server.py

@@ -27,6 +27,9 @@ class BackendServer:
 
         self.selector = selectors.DefaultSelector()
         self.server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+        self.server_socket.setsockopt(
+            socket.SOL_SOCKET, socket.SO_REUSEADDR, 1
+        )
         self._bind_socket(host, port)
         self.server_socket.listen()
         self.server_socket.setblocking(False)