prod deployment documentation

spotlight-client/README.md

@@ -54,7 +54,7 @@ There is no per-view authentication; enabling auth (via environment variable, as
 
 ## Deploys
 
-This app can currently only be run locally or in a staging environment. Information about the production environment will be added here once it is provisioned.
+This app can be run locally, in staging, and in production. Deploying to staging and production are very similar, as described below.
 
 ### Pre-requisites
 
@@ -72,6 +72,14 @@ You should then test this locally by running `firebase serve`: it will run the s
 
 When you're satisfied, deploy the frontend to staging with `firebase deploy -P staging`. Test vigorously on staging before deploying to production.
 
+### Deploying to Production
+
+Similar to above, but with slightly different commands:
+
+Generate a production build with `yarn build`. Test locally with `firebase serve`. Deploy the frontend with `firebase deploy -P production`.
+
+Test vigorously! Don't be afraid to rollback the deploy through the Firebase console.
+
 ## Available Scripts
 
 Besides the scripts mentioned above for running and deploying the app, you can also run: