docs: update author license and description

Dockerfile

@@ -16,5 +16,5 @@ ENTRYPOINT [ "gitstats"]
 
 # Add metadata labels
 LABEL org.opencontainers.image.source="https://github.com/shenxianpeng/gitstats" \
-      org.opencontainers.image.description="GitStats - generates visual reports for git repositories" \
+      org.opencontainers.image.description="GitStats - Visualize Your Git Repositories" \
       org.opencontainers.image.licenses="GPLv3"

LICENSE

@@ -1,4 +1,4 @@
-gitstats license is GPLv2/GPLv3, see [doc/GPLv2](doc/GPLv2) and [doc/GPLv3](doc/GPLv3) for the text of the license, doc/GPLv3 respectively.
+gitstats license is under GPLv2/GPLv3, see [GPLv2](doc/GPLv2) and [GPLv3](doc/GPLv3) for the text of the license.
 
 sortable.js, contained in gitstats, is licensed under the MIT license. See the
 file itself for details.

doc/AUTHOR

@@ -1,8 +1,13 @@
-Author can be reached by sending e-mail to <hoxu@users.sf.net>.
+Author can be reached by sending e-mail to <xianpeng.shen@gmail.com>.
+
 Include "gitstats" in the subject or prepare to battle the spam filters.
 
 See the following command for list of authors who have contributed:
-  $ git shortlog HEAD
+
+```bash
+$ git shortlog HEAD
+```
 
 Also thanks to the following people:
-Alexander Botero-Lowry
+
+[![GitStats Report](https://contrib.rocks/image?repo=shenxianpeng/gitstats)](https://github.com/shenxianpeng/gitstats/graphs/contributors)

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "gitstats"
-description = "GitStats - generates visual reports for git repositories"
+description = "GitStats - Visualize Your Git Repositories"
 readme = "README.md"
 keywords = ["git", "gitstats", "statistics", "git history"]
 authors = [