Fix kitematic images for #777 (#2940)

* Fix kitematic userguide for #777

* Fix Kitematic tutorial: Serve a static website with NGINX

* Fix image on Set up a Minecraft server

* Fix image and text for kitematic rethink tutorial, this should fix #777

kitematic/rethinkdb-dev-database.md

@@ -31,9 +31,9 @@ tab and then the `Ports` section:
 ![Rethink create button](images/rethink-ports.png)
 
 You can see there that for RethinkDB port `28015`, the container is listening on
-host `192.168.99.100` and port `49154` (in this example - ports may be different
+host `localhost` and port `32783` (in this example - ports may be different
 for you). This means you can now reach RethinkDB via a client driver at
-`192.168.99.100:49154`. Again, this IP address may be different for you.
+`127.0.0.1:32783`. Again, this IP address may be different for you.
 
 ### (Advanced) Saving Data into RethinkDB with a local Node.js App
 
@@ -48,8 +48,8 @@ Node.js](http://nodejs.org/).
 
 In your terminal, type:
 
-     $ export RDB_HOST=192.168.99.100 # replace with IP from above step
-     $ export RDB_PORT=49154 # replace with Port from above step
+     $ export RDB_HOST=127.0.0.1 # replace with IP from above step
+     $ export RDB_PORT=32783 # replace with Port from above step
      $ git clone https://github.com/rethinkdb/rethinkdb-example-nodejs-chat
      $ cd rethinkdb-example-nodejs-chat
      $ npm install