docs: add -o 0.0.0.0 to startup instructions

Author: bethesque

README.md

@@ -121,8 +121,8 @@ Use the HAL browser to view documentation as you browse.
     * unix users just use your package manager
 * Run `git clone git@github.com:pact-foundation/pact_broker.git && cd pact_broker/example`
 * Run `bundle install`
-* Run `bundle exec rackup -p 8080` (this will use a Sqlite database. If you want to try it out with a Postgres database, see the [README](https://github.com/pact-foundation/pact_broker/tree/master/example) in the example directory.)
-* Open [http://localhost:8080](http://localhost:8080) and you should see a list containing the pact between the Zoo App and the Animal Service.
+* Run `bundle exec rackup -p 9292 -o 0.0.0.0` (this will use a Sqlite database. If you want to try it out with a Postgres database, see the [README](https://github.com/pact-foundation/pact_broker/tree/master/example) in the example directory.)
+* Open [http://localhost:9292](http://localhost:9292) and you should see a list containing the pact between the Zoo App and the Animal Service.
 * Click on the arrow to see the generated HTML documentation.
 * Click on either service to see an autogenerated network diagram.
 * Click on the HAL Browser link to have a poke around the API.