Add one more sudo

Connects #214

Author: orangejulius

README.md

@@ -133,7 +133,7 @@ Advanced users may have a preference how this is done on their system, but a bas
 git clone https://github.com/pelias/docker.git && cd docker
 
 # install pelias script
-ln -s "$(pwd)/pelias" /usr/local/bin/pelias
+sudo ln -s "$(pwd)/pelias" /usr/local/bin/pelias
 ```
 
 Once the command is correctly installed you should be able to run the following command to confirm the pelias command is available on your path: