Update README.md

Author: GitOnion

README.md

@@ -29,7 +29,7 @@ If you want to spin up an instance and start using immediately, see [Docker depl
 If you want to contribute to the project, start with [manual deployment](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-manual-deployment).
 
 ### Configuration
-CodiMD is highly customizable, learn about all configuration options of networking, security, performance, resources, privilege, privacy, image storage, and authentication in [CodiMD Configuration](/s/codimd-configuration).
+CodiMD is highly customizable, learn about all configuration options of networking, security, performance, resources, privilege, privacy, image storage, and authentication in [CodiMD Configuration](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-configuration).
 
 ### Upgrading and Migration
 Upgrade CodiMD from previous version? See [this guide](https://hackmd.io/c/codimd-documentation/%2Fs%2Fcodimd-upgrade)