update README.md

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
 
@@ -30,18 +23,18 @@ pip install -r requirements.txt
 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
@@ -53,16 +46,3 @@ img_flipped = flip_image(img=img)
 ## 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/