diff --git a/stack.env b/stack.env
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+# =============================================================================
+# Netbox Stack Environment Variables
+# =============================================================================
+# This file is used by Portainer when deploying from Git repository.
+# Sensitive values (marked CHANGE_ME) must be set in Portainer UI.
+# =============================================================================
+
+# Tailscale
+TS_AUTHKEY=CHANGE_ME
+
+# PostgreSQL
+DB_HOST=postgresql.taila5ad8.ts.net
+DB_PORT=5432
+DB_NAME=netbox
+DB_USER=netbox
+DB_PASSWORD=CHANGE_ME
+
+# Netbox
+SECRET_KEY=CHANGE_ME
+
+# Superuser (first deployment only)
+SUPERUSER_NAME=admin
+SUPERUSER_EMAIL=admin@example.com
+SUPERUSER_PASSWORD=CHANGE_ME
+SKIP_SUPERUSER=false