ci(aio): include extra files in AIO deployment based on mode

Any files that are inside the `extra-files/{mode}` folder
will be copied over to the `dist` folder before deployment
to Firebase.

See #18287

aio/scripts/deploy-to-firebase.sh

@@ -78,6 +78,9 @@ echo "Deployment URL    : $deployedUrl"
   # Build the app
   yarn build -- --env=$deployEnv
 
+  # Include any mode-specific files
+  cp -rf src/extra-files/$deployEnv/. dist/
+
   # Check payload size
   yarn payload-size
 

aio/src/extra-files/README.md

@@ -0,0 +1,9 @@
+# Extra files folder
+
+This folder is used for extra files that should be included in deployments to firebase.
+
+After the AIO application had been built and before it is deployed all files and folders
+inside the folder with the same name as the current deployment mode (next, stable, archive)
+will be copied to the `dist` folder.
+
+See the `scripts/deploy-to-firebase.sh` script for more detail.

aio/src/extra-files/archive/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /

aio/src/extra-files/next/robots.txt

@@ -0,0 +1,2 @@
+User-agent: *
+Disallow: /