Advanced Configuration

A number of advanced settings can be applied using environment variables. Copy .env.example into the same folder as your docker compose file, and modify the values as needed.

Environment Variables

Name	Default	Description
COMPOSE_PROJECT_NAME	nexarag	Overrides the default Docker Compose project name to group containers under a unified prefix.
NEO4J_USERNAME	neo4j	Username for authenticating with the Neo4j database.
NEO4J_PASSWORD	password	Password for the Neo4j user.
RABBITMQ_USERNAME	guest	Username for connecting to RabbitMQ.
RABBITMQ_PASSWORD	guest	Password for the RabbitMQ user.
API_PORT	8000	Port exposed by the API service.
FRONTEND_PORT	5000	Port for serving the frontend application.
OLLAMA_PORT	11434	Port used by the Ollama server for model inference.
MCP_PORT	9000	Port for the MCP service.
EMBEDDING_CHUNK_SIZE	500	Size of text chunks (in characters or tokens, depending on implementation) used before generating embeddings.
EMBEDDING_CHUNK_OVERLAP	100	Number of overlapping characters/tokens between embedding chunks to preserve context.
EMBEDDING_MODEL	nomic-embed-text:v1.5	Model identifier used for generating vector embeddings.
DEFAULT_MODEL	gemma3:1b	Default LLM used for chatting and generating Cypher queries