fix(docker-google-cloud): Update docker build process to allow Google Cloud CLIENT_ID to be passed in at runtime, update docs. (#651)

public/config/google.js

@@ -12,7 +12,7 @@ window.config = {
       // ~ REQUIRED
       // Authorization Server URL
       authority: 'https://accounts.google.com',
-      client_id: '99926187585-6nli1cbsf1774f575vj9ti0j7h6ru711.apps.googleusercontent.com', //'YOURCLIENTID.apps.googleusercontent.com',
+      client_id: 'YOURCLIENTID.apps.googleusercontent.com',
       redirect_uri: 'http://localhost:5000/callback', // `OHIFStandaloneViewer.js`
       response_type: 'id_token token',
       scope: 'email profile openid https://www.googleapis.com/auth/cloudplatformprojects.readonly https://www.googleapis.com/auth/cloud-healthcare', // email profile openid