neural-search

Is your feature request related to a problem? Please describe.
This line sets the parameter save_dir to a directory two layers above the current directory. This can be confusing and also lead to a crash in case the current user does not have write permissions to that di

https://github.com/PaddlePaddle/PaddleNLP/tree/develop/examples/machine_translation/transformer
在我们的基于 Transformer 的 Machine Translation 例子中，数据准备这一步奏仅提供了一个预处理好的 WMT14 en-de 数据，并没有告诉读者该怎么处理数据，每一步应该怎么做，可否像 fairseq (https://github.com/facebookresearch/fairseq/tree/main/examples/translation) 一样，将每一个步奏都提供出来。

另外，我们的PaddleNLP数据处理看起来和代码高度耦合。意思就是我每想用新的机器翻译数据训练模型，我需要在PaddleNLP里先写一些支持该数据的新的代码。这从用户的视角看并不是

Current docker image size is insane. It is 2.55 GB. Reduce that to below 1GB or less. Apply changes from this reference: https://hackernoon.com/tips-to-reduce-docker-image-sizes-876095da3b34

Describe the bug

Elastiknn exceptions do not extend ElasticsearchException, so they seem to always be turned into a 500, when a 4xx would often be more appropriate.

Expected behavior

• When a query is incompatible with a mapping, use an exception that will get converted to a 400 response code. [See code where exception is initialized.](https://github.com/alexklibisz/elastiknn/blob