added phpipam and tailscale integration

backend/.env.example

@@ -30,6 +30,15 @@ DISABLED_PROVIDERS=
 # AUTHENTIK_CLIENT_ID=your_client_id
 # AUTHENTIK_CLIENT_SECRET=your_client_secret
 
+# phpIPAM (optional — leave blank to disable phpIPAM integration)
+# PHPIPAM_URL=https://ipam.example.com
+# PHPIPAM_APP_ID=sloth-manager
+# PHPIPAM_TOKEN=your_app_token
+
+# Tailscale (optional — leave blank to disable Tailscale integration)
+# TAILSCALE_API_KEY=tskey-api-xxxxxxxxxxxxxxxx
+# TAILSCALE_TAILNET=yourorg.github
+
 # Auth — generate a strong random secret, e.g: node -e "console.log(require('crypto').randomBytes(32).toString('hex'))"
 JWT_SECRET=change-this-to-a-long-random-string
 JWT_EXPIRES_IN=24h