Update README.md

server-ce/README.md

@@ -36,16 +36,30 @@ ShareLaTeX depends on [MongoDB](http://www.mongodb.org/) (must be 2.4 or later),
 [Redis](http://redis.io/) (must be version 2.6.12 or later).
 These should be running on the host system.
 
-By default the ShareLaTeX Docker container looks for these running on the host
-machine at port 27017 (for Mongo) and port 6379 (for Redis). These are the defaults
-ports for both databases so you shouldn't need to change them.
-
 Note that Docker containers each come with their own network stack, and Mongo and Redis
 often listen by default on `127.0.0.1` which is not accessible on the host
 from inside the Docker container. Instead, you should configure Mongo and Redis to
 also listen on `172.17.42.1` (or whatever ip iddress the docker0 interface has on your
 host). This can be done in `/etc/mongod.conf` and `/etc/redis/redis.conf`.
 
+```
+# /etc/mongod.conf
+...
+bind_ip = 172.17.42.1
+...
+```
+
+```
+# /etc/redis/redis.conf
+...
+bind 172.17.42.1
+...
+```
+
+By default the ShareLaTeX Docker container looks for these running on the host
+machine at port 27017 (for Mongo) and port 6379 (for Redis). These are the defaults
+ports for both databases so you shouldn't need to change them.
+
 If you want to point ShareLaTeX at a database in a different location, you can
 configure the container with environment variables. See the **Configuration Options**
 section below.