Add LightRAG service configuration and credentials

- Introduced LightRAG hostname and credentials in .env.example for environment setup.
- Updated Caddyfile to include reverse proxy configuration for LightRAG service.
- Added LightRAG service definition in docker-compose.yml with necessary environment variables and volume mappings.
- Enhanced README.md to document LightRAG integration and access details.
- Updated scripts to generate LightRAG credentials and include them in the final report for user visibility.

.env.example

@@ -147,6 +147,7 @@ FLOWISE_HOSTNAME=flowise.yourdomain.com
 GRAFANA_HOSTNAME=grafana.yourdomain.com
 LANGFUSE_HOSTNAME=langfuse.yourdomain.com
 LETTA_HOSTNAME=letta.yourdomain.com
+LIGHTRAG_HOSTNAME=lightrag.yourdomain.com
 LT_HOSTNAME=translate.yourdomain.com
 N8N_HOSTNAME=n8n.yourdomain.com
 NEO4J_HOSTNAME=neo4j.yourdomain.com
@@ -206,6 +207,17 @@ PADDLEOCR_PASSWORD_HASH=
 RAGAPP_USERNAME=
 RAGAPP_PASSWORD=
 
+############
+# [required]
+# LightRAG credentials (for built-in authentication)
+# Username and password for web interface login
+# API key for programmatic access to the API
+############
+
+LIGHTRAG_USERNAME=
+LIGHTRAG_PASSWORD=
+LIGHTRAG_API_KEY=
+
    #
    #
 #######