docs: update README

Author: eWloYW8

README.md

@@ -1 +1,10 @@
 # CSOJ-WebUI
+
+The official web frontend for the CSOJ (Containerized Secure Online Judge) project.
+
+[![Build and Release](https://github.com/ZJUSCT/CSOJ-WebUI/actions/workflows/build.yml/badge.svg)](https://github.com/ZJUSCT/CSOJ-WebUI/actions/workflows/build.yml)
+
+## Related Repo
+
+- [ZJUSCT/CSOJ](https://github.com/ZJUSCT/CSOJ)
+- [ZJUSCT/CSOJ-AdminPanel](https://github.com/ZJUSCT/CSOJ-AdminPanel)