A slight change in docs, the URI of cello repository.
@@ -114,7 +114,7 @@ You may check `git` and `make` are installed to clone the code.
```sh
$ sudo aptitude install git make -y
-$ git clone https://github.com/yeasy/cello && cd cello
+$ git clone http://gerrit.hyperledger.org/r/cello && cd cello
```
### Docker images pulling
