add google cloud md file

GoogleCloudDeployment.md

@@ -0,0 +1,36 @@
+# Google Cloud deployment
+
+This setup is similar to the [Docker Deployment](DockerDeployment.md), except that the `docker-compose` is hosted by Google Cloud.
+
+## Google Cloud shell setup
+
+Google Cloud is alternative way to set up BTCPayServer.
+
+Start by clicking the following button:
+
+[![Open in Cloud Shell](http://gstatic.com/cloudssh/images/open-btn.svg)](https://console.cloud.google.com/cloudshell/open?git_repo=https%3A%2F%2Fgithub.com%2Fbtcpayserver%2Fbtcpayserver-googlecloud&page=editor)
+
+You can log into [Google Cloud Console](https://console.cloud.google.com) with your Google account.
+
+Final installation steps:
+
+* On Google cloud shell, Set the default project and zone where to deploy instance
+* Change yaml file to configure VM instance and BTCPay server: ![GCE and BTCPay Config](img/gcloud-yaml.png)
+* Change mode 755 for shell scripts  and run 'deploy.sh \<any deployname\>' to start depolyment
+* (Wait for Google Cloud deployment for a minute)
+* A static IP is shown on the google cloud shell
+* Go to your DNS service and map it with your domain name, say EXAMPLE.MYSITE.com
+* ssh to the vm  from Google cloud console's VM instances list
+* on ssh, Go to /btcpayserver-docker directry and run 'changedomain.sh EXAMPLE.MYSITE.com'
+* Access to https://EXAMPLE.MYSITE.com by browser
+* Click 'Register' and create an account - This will be your **admin** account!
+* **Done!** Visit `https://EXAMPLE.MYSITE.com/stores` to create your store and begin invoicing.
+
+For advanced users, you can connect via SSH with the information on `https://EXAMPLE.MYSITE.com/server/services/ssh`, and:
+
+* Run `docker ps` and `docker logs xxx` to view running processes
+* Run `btcpay-down.sh` and `btcpay-up.sh` to stop and start the BTCPayServer
+
+Approximate Cost : **70 USD per month**
+
+Learn more: [btcpayserver/btcpayserver-googlecloud](https://github.com/btcpayserver/btcpayserver-googlecloud)