Handle demo- projects

Author: jamesdaniels

packages/util/postinstall.js

@@ -76,6 +76,11 @@ try {
         return partialConfig;
       }
       const projectId = partialConfig.projectId || '-';
+      // If the projectId starts with demo- this is an demo project from the firebase emulators
+      // treat the config as whole
+      if (projectId.startsWith('demo-')) {
+        return partialConfig;
+      }
       const appId = partialConfig.appId;
       const apiKey = partialConfig.apiKey;
       if (!appId || !apiKey) {