Fix link to requirements in Nginx recipe (#3969)

docs/recipes/nginx.md

@@ -67,29 +67,22 @@ properly. For more information, see
 
 ## Setting things up
 
-Read again [the requirements](index.md#requirements).
+Review the [requirements](../index.md#requirements), then follow ese steps.
 
-Ready?
+1.  Create the required directories
 
---
+    ```bash
+    mkdir -p auth data
+    ```
 
-Create the required directories
+2.  Create the main nginx configuration you will use. Paste this code block into a new file called `auth/nginx.conf`:
 
-```
-mkdir -p auth
-mkdir -p data
-```
-
-Create the main nginx configuration you will use.
-
-```
-
-cat > auth/nginx.conf << 'EOF'
-events {
+    ```conf
+    events {
         worker_connections  1024;
-}
+    }
 
-http {
+    http {
 
       upstream docker-registry {
         server registry:5000;
@@ -147,28 +140,26 @@ http {
           proxy_read_timeout                  900;
         }
       }
-}
-EOF
-```
+    }
+    ```
 
-Now create a password file for "testuser" and "testpassword"
+3.  Create a password file `auth/nginx.htpasswd` for "testuser" and "testpassword".
 
-```
-docker run --rm --entrypoint htpasswd registry:2 -Bbn testuser testpassword > auth/nginx.htpasswd
-```
+    ```bash
+    $ docker run --rm --entrypoint htpasswd registry:2 -Bbn testuser testpassword > auth/nginx.htpasswd
+    ```
 
-Copy over your certificate files
+4.  Copy your certificate files to the `auth/` directory.
 
-```
-cp domain.crt auth
-cp domain.key auth
-```
+    ```bash
+    $ cp domain.crt auth
+    $ cp domain.key auth
+    ```
 
-Now create your compose file
+5.  Create the compose file. Paste the following YAML into a new file called `docker-compose.yml`.
 
-```
-cat <<EOF > docker-compose.yml
-nginx:
+    ```yaml
+    nginx:
       image: "nginx:1.9"
       ports:
         - 5043:443
@@ -178,14 +169,13 @@ nginx:
         - ./auth:/etc/nginx/conf.d
         - ./auth/nginx.conf:/etc/nginx/nginx.conf:ro
 
-registry:
+    registry:
       image: registry:2
       ports:
         - 127.0.0.1:5000:5000
       volumes:
         - `pwd`./data:/var/lib/registry
-EOF
-```
+    ```
 
 ## Starting and stopping