Fixed formatting and added code blocks

The `<your ip>` was hidden before due to GitHub Markdown stuff (now it's in code tags)

README.md

@@ -8,13 +8,15 @@ Dockerfile
 ----------
 Use this to build a new image
 
-$ sudo docker build .
+    $ sudo docker build .
 
 With a tag for easier reuse
-$ sudo docker build  -t <your username>/django-docker .
+
+    $ sudo docker build  -t <your username>/django-docker .
 
 Running the container
-$ sudo docker run -d -p :8000 <your username>/django-docker
 
-Now go to <your ip>:8000 in your browser
+    $ sudo docker run -d -p :8000 <your username>/django-docker
+
+Now go to `<your ip>:8000` in your browser