fix save file

server.py

@@ -78,16 +78,13 @@ async def create_upload_file(file: UploadFile | None, package: Annotated[str, Fo
             os.makedirs(dir_last)
         if not os.path.exists(dir_stable):
             os.makedirs(dir_stable)
-        with open(f"{dir_file}/{filename}", 'r + b') as f:
-            f.seek(0)
-            f.write(contents)
-        with open(f"{dir_last}/{filename}", 'r + b') as f:
-            f.seek(0)
-            f.write(contents)
+        with open(f"{dir_file}/{filename}", 'w') as f:
+            f.write(str(contents))
+        with open(f"{dir_last}/{filename}", 'w') as f:
+            f.write(str(contents))
         if stable:
-            with open(f"{dir_stable}/{filename}", 'r + b') as f:
-                f.seek(0)
-                f.write(contents)
+            with open(f"{dir_stable}/{filename}", 'w') as f:
+                f.write(str(contents))
     except Exception as err:
         return {"message": "There was an error uploading the file, error {err}".format(err=err)}
     finally: