update README.md

## csst_proto 

[![Documentation Status](https://readthedocs.org/projects/csst-proto/badge/?version=latest)](https://csst-proto.readthedocs.io/en/latest/?badge=latest)

CSST L1 pipeline prototype.

## homepage

This code is available at *CSST GitLab*:

- [https://csst-tb.bao.ac.cn/code/csst-l1/csst_proto](https://csst-tb.bao.ac.cn/code/csst-l1/csst_proto).

## documentation

A sphinx-based documentation is available at

- [https://csst-proto.readthedocs.io/en/latest/](https://csst-proto.readthedocs.io/en/latest/)

CSST 流水线原型，用于展示示例代码。

## dependency

- numpy~=1.20.3

- joblib~=1.1.0

- astropy~=5.1

- numpy==1.23.3

- scipy==1.9.2

- joblib==1.2.0

- astropy==5.1

- pytest==7.2.1

- coverage==7.2.1

- toml==0.10.2

## installation

python setup.py install

```

or a single-line command

or a single-line command (the requirements are not installed automatically)

```bash

sh -c "$(curl -fsSL https://csst-tb.bao.ac.cn/code/csst-l1/csst_proto/-/raw/main/install.sh)"

```

## instruction

## tutorial

A simple example on how to use this package:

```python

from csst_proto.api import flip_image

from csst_proto import flip_image

from astropy.io import fits

# read an L0 image

## algorithm description

The `csst_proto` uses an awesome algorithm based on `numpy.ndarray` indices to flip images.

---

## useful links

- python packaging user guide: https://packaging.python.org/en/latest/

- packaging binary extensions (C/C++): https://packaging.python.org/en/latest/guides/packaging-binary-extensions

- `setuptools`: https://packaging.python.org/en/latest/tutorials/installing-packages/

- gitlab CI/CD pipeline: https://docs.gitlab.com/ee/ci/pipelines/

- gitlab runners: https://docs.gitlab.com/runner/

- `sphinx`: https://www.sphinx-doc.org/en/master/index.html

- markdown: https://www.markdownguide.org/

- restructured text: https://docutils.sourceforge.io/rst.html

- readthedocs: https://readthedocs.io/ or https://rtfd.io/