Initial OpenObserve Cloudron package

POSTINSTALL

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+OpenObserve is now installed and ready to use!
+
+Initial Login Credentials:
+- Email: admin@{CLOUDRON_APP_DOMAIN}
+- Password: openobserve123
+
+IMPORTANT: Please change the default password immediately after first login for security.
+
+Features:
+- Observability platform for logs, metrics, and traces
+- Real-time data ingestion and analysis
+- Built-in alerting and visualization
+- OIDC authentication integrated with Cloudron
+
+Access your OpenObserve instance at: {CLOUDRON_APP_ORIGIN}
+
+For documentation and help, visit: https://openobserve.ai/docs/