Add Google Cloud quick-launch button (#1069)

README.md

@@ -8,6 +8,7 @@ Try it out:
 ```bash
 docker run -it -p 127.0.0.1:8080:8080 -v "${HOME}/.local/share/code-server:/home/coder/.local/share/code-server" -v "$PWD:/home/coder/project" codercom/code-server:v2
 ```
+[![Run on Google Cloud](https://storage.googleapis.com/cloudrun/button.svg)](https://deploy.cloud.run?dir=gcloud/)
 
 - **Consistent environment:** Code on your Chromebook, tablet, and laptop with a
   consistent dev environment. develop more easily for Linux if you have a

gcloud/Dockerfile

+FROM codercom/code-server:v2
+
+EXPOSE 8080