Fixed docker usage (scaleway#90)

Author: moul

README.md

@@ -97,7 +97,7 @@ You can run scaleway-cli in a sandboxed way using Docker.
 *warning*: caching is disabled
 
 ```console
-$ docker run -it --rm --volume=$HOME/.scwrc:/root/.scwrc scaleway/cli ps
+$ docker run -it --rm --volume=$HOME/.scwrc:/.scwrc scaleway/cli ps
 ```
 
 ### Manual build

dist/README.md

@@ -5,5 +5,5 @@ You can run scaleway-cli in a sandboxed way using Docker.
 **warning: caching is disabled**
 
 ```console
-$ docker run -it --rm --volume=$HOME/.scwrc:/root/.scwrc scaleway/cli ps
+$ docker run -it --rm --volume=$HOME/.scwrc:/.scwrc scaleway/cli ps
 ```