Implement OSS monorepo for Slack support assistant with RAG-enabled backend and dashboard

.env.backend

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+# Application
+DEBUG=false
+HOST=0.0.0.0
+PORT=8000
+
+# Database
+DATABASE_URL=postgresql://wingman:wingman@postgres:5432/wingman
+
+# Chroma
+CHROMA_HOST=chroma
+CHROMA_PORT=8000

.env.chroma

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+IS_PERSISTENT=TRUE

.env.example

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+# Wingman Environment Configuration
+# Copy this file to .env and fill in your values
+
+# ============================================================================
+# Slack Configuration
+# ============================================================================
+
+# Required: Bot User OAuth Token (starts with xoxb-)
+# Used for: Posting messages, reading channels, bot operations
+# Scope: See SLACK_AUTH.md for required scopes
+SLACK_BOT_TOKEN=xoxb-your-bot-token-here
+
+# Required: App-Level Token (starts with xapp-)
+# Used for: Socket Mode connection (recommended for development)
+# Note: Only needed if using Socket Mode
+SLACK_APP_TOKEN=xapp-your-app-token-here
+
+# Required: Signing Secret
+# Used for: Verifying requests from Slack
+# Found in: Slack App Settings > Basic Information
+SLACK_SIGNING_SECRET=your-signing-secret-here
+
+# Optional: User OAuth Token (starts with xoxp-)
+# Used for: User-level actions (reading private messages, etc.)
+# Note: Only needed for specific user actions
+SLACK_USER_TOKEN=
+
+# Optional: OAuth Credentials (for OAuth flow)
+# Used for: Installing the app via OAuth
+SLACK_CLIENT_ID=
+SLACK_CLIENT_SECRET=
+
+# ============================================================================
+# AI/LLM Configuration
+# ============================================================================
+
+# Option 1: OpenRouter (Recommended)
+# Get your API key from: https://openrouter.ai/keys
+OPENROUTER_API_KEY=sk-or-your-openrouter-key-here
+
+# Option 2: OpenAI (Alternative)
+# Get your API key from: https://platform.openai.com/api-keys
+OPENAI_API_KEY=
+
+# LLM Model to use
+# OpenRouter format: "openai/gpt-4-turbo-preview", "anthropic/claude-3-opus"
+# OpenAI format: "gpt-4-turbo-preview", "gpt-3.5-turbo"
+LLM_MODEL=openai/gpt-4-turbo-preview
+
+# LLM Settings
+LLM_TEMPERATURE=0.7
+LLM_MAX_TOKENS=2000
+
+# ============================================================================
+# Database Configuration
+# ============================================================================
+
+# PostgreSQL connection (docker-compose handles this automatically)
+DATABASE_URL=postgresql://wingman:wingman@postgres:5432/wingman
+
+# For local development outside Docker:
+# DATABASE_URL=postgresql://wingman:wingman@localhost:5432/wingman
+
+# ============================================================================
+# Vector Store Configuration
+# ============================================================================
+
+# Chroma settings (docker-compose handles this automatically)
+CHROMA_HOST=chroma
+CHROMA_PORT=8000
+CHROMA_COLLECTION=slack_messages
+
+# For local development outside Docker:
+# CHROMA_HOST=localhost
+# CHROMA_PORT=8001
+
+# ============================================================================
+# RAG Configuration
+# ============================================================================
+
+# Embedding model for vector search
+EMBEDDING_MODEL=text-embedding-ada-002
+
+# Text chunking settings
+CHUNK_SIZE=1000
+CHUNK_OVERLAP=200
+
+# Retrieval settings
+RETRIEVAL_TOP_K=5
+
+# ============================================================================
+# Application Configuration
+# ============================================================================
+
+# Debug mode (set to true for development)
+DEBUG=false
+
+# Server settings
+HOST=0.0.0.0
+PORT=8000
+
+# Frontend API URL
+NEXT_PUBLIC_API_URL=http://localhost:8000

.env.frontend

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+NEXT_PUBLIC_API_URL=http://localhost:8000

.env.postgres

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+POSTGRES_DB=wingman
+POSTGRES_USER=wingman
+POSTGRES_PASSWORD=wingman

.gitignore

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+# Environment variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+# Keep .env.* templates but ignore local overrides
+.env.*.local
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+*.log
+
+# Virtual environments
+venv/
+env/
+ENV/
+.venv
+
+# Testing
+.pytest_cache/
+.coverage
+htmlcov/
+.tox/
+
+# Node.js
+node_modules/
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.pnpm-debug.log*
+package-lock.json
+yarn.lock
+
+# Next.js
+.next/
+out/
+.vercel
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# Docker
+*.log
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+.DS_Store
+
+# OS
+Thumbs.db