message: add Google Cloud setup instructions
diff: @@ -146,6 +146,21 @@ docker run -d -p 80:3000 bkimminich/juice-shop
  4. Your container will be available at `http://<dns name
  label>.<location name>.azurecontainer.io:3000`
  +### Google Compute Engine Instance
  +
  +1. Login to the Google Cloud Console and [open Cloud Shell](https://console.cloud.google.com/home/dashboard?cloudshell=true).
  +2. Launch a new GCE instance based on the juice-shop container. Take note of the `EXTERNAL_IP` provided in the output.
  +```
  +gcloud compute instances create-with-container owasp-juice-shop-app --container-image bkimminich/juice-shop
  +```
  +
  +3. Create a firewall rule that allows inbound traffic to port 3000
  +```
  +gcloud compute firewall-rules create juice-rule --allow tcp:3000
  +```
  +
  +4. Your container is now running and available at `http://[EXTERNAL_IP]:3000/`
  +
  ## Node.js version compatibility
  ![GitHub package.json dynamic](https://img.shields.io/github/package-json/cpu/bkimminich/juice-shop)
  