Add Docker Compose for local development

[mingshl]

Originally created by @mingshl in mingshl/opensearch-agent-server#20

Description

Create a docker-compose.yml that spins up the full 3-component stack for local development:

1. OpenSearch (port 9200)
2. OpenSearch Agent Server (port 8001)
3. OpenSearch Dashboards (port 5601)

Deliverables

• docker-compose.yml at repo root
• Dockerfile for the agent server
• Update README quick-start section to reference docker-compose
• .env.docker example for container environment

Acceptance Criteria

• docker-compose up starts all 3 services
• Chat in Dashboards connects to agent server
• Agent server connects to OpenSearch via MCP
• Health check passes: curl http://localhost:8001/health

[sohamzope18]

Hi! I’d like to work on this issue.

I can add a docker-compose.yml that brings up the full stack, create a Dockerfile for the agent server, and include an .env.docker example for container configuration. I’ll also update the README quick-start section so contributors can run the project locally with docker compose up.

[jiapingzeng]

Hi @sohamzope18, thanks for volunteering! We would appreciate the help. Assigned the issue to you.