add ssl support

format code

remove expects and unwrap

meilisearch-http/tests/common.rs

@@ -31,6 +31,8 @@ impl Server {
             main_map_size: default_db_options.main_map_size,
             update_map_size: default_db_options.update_map_size,
             http_payload_size_limit: 10000000,
+            ssl_key_path: None,
+            ssl_cert_path:None,
         };
 
         let data = Data::new(opt.clone());