modified docker cleanup steps, streamlined docker install steps for mac vs linux (#586)

_docs/guides/bookinfo.md

@@ -243,14 +243,15 @@ uninstall and clean it up using the following instructions.
 
 ### Uninstall from Docker environment
 
-1. Showdown the application
+1. Delete the routing rules and application containers
 
-  ```bash
-  docker-compose -f samples/bookinfo/consul/bookinfo.yaml down
-  ```
+   ```bash
+   samples/bookinfo/consul/cleanup.sh
+   ```
 
-2. Cleanup rules
+2. Confirm cleanup
 
-  ```
-  TBD
-  ```
+   ```bash
+   istioctl get routerules   #-- there should be no more routing rules
+   kubectl get pods          #-- the BookInfo pods should be deleted
+   ```

_docs/setup/consul/quick-start.md

@@ -40,12 +40,18 @@ Quick Start instructions to install and configure Istio in a Docker Compose setu
    export PATH=$PWD/bin:$PATH
    ```
 
-1. Generate a configuration file which will be used by `istioctl` and Istio Pilot
+1. Generate a configuration file which will be used by Istio Pilot
 
     ```bash
     istioctl context-create --api-server http://172.28.0.13:8080
     ```
 
+1. For Linux users, configure the `DOCKER_GATEWAY` environment variable
+
+   ```bash
+   export DOCKER_GATEWAY=172.28.0.1:
+   ```
+
 1. Change directory to the root of the Istio installation directory.
 
 1. Bring up the Istio control plane containers:
@@ -61,7 +67,12 @@ Quick Start instructions to install and configure Istio in a Docker Compose setu
    ```
 
    > If the `Istio-Pilot` container terminates, re-run the command from the previous step.
-    
+
+1. Configure `istioctl` to use mapped local port for the Istio API server:
+
+    ```bash
+    istioctl context-create --context istio-local --api-server http://localhost:8080
+    ```
 
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