Merge pull request #1 from vrkansagara/vrkansagara-patch-1

loop back address updated.

Author: vrkansagara

README.md

@@ -22,13 +22,14 @@ Documentation is [in the doc tree](doc/), and can be compiled using [bookdown](h
 
 ```console
 $ bookdown doc/bookdown.json
-$ php -S 0.0.0.0:8080 -t doc/html/ # then browse to http://localhost:8080/
+$ php -S 127.0.0.1:8080 -t doc/html/ # then browse to http://localhost:8080/
 ```
 
 > ### Bookdown
 >
-> You can install bookdown globally using `composer global require bookdown/bookdown`. If you do
-> this, make sure that `$HOME/.composer/vendor/bin` is on your `$PATH`.
+> You can install bookdown globally using `composer global require bookdown/bookdown`. 
+>If you do this, make sure that `$HOME/.composer/vendor/bin` is on your `$PATH`.
+> Add this line into .bashrc on linux `export PATH="$PATH:$HOME/.composer/vendor/bin"`
 
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