google credentials

.env.dist

@@ -1,4 +1,12 @@
+# Google Cloud Authentication - Choose ONE of the following methods:
+
+# Option 1: Local development - Path to JSON credentials file
 GOOGLE_APPLICATION_CREDENTIALS=credentials.json
+
+# Option 2: Production - JSON content as string (useful for serverless platforms like Vercel)
+# Paste the entire JSON content of your service account key here
+# GOOGLE_CREDENTIALS_JSON={"type":"service_account","project_id":"..."}
+
 PORT=8000
 HOST=0.0.0.0
 BASIC_AUTH_USERNAME=admin