Changes in commands for bower installation (#2956)

Author: Himanshi-Khandelwal

docs/installation/local.md

@@ -64,6 +64,14 @@ CREATE DATABASE oevent WITH OWNER john;
 npm install bower -g
 bower install
 ```
+
+if error
+```sh
+sudo npm install bower -g
+sudo ln -s /usr/bin/nodejs /usr/bin/node
+sudo bower install
+```
+
 for mac user:
 ```sh
 sudo npm install bower -g