chore: add environment configuration and security templates

- .env.example: Template with clear API key instructions
  * OpenAI, Pinecone, Supabase configuration
  * Redis connection settings
  * Backend/Frontend URLs
  * Inline documentation for each variable

- .gitignore: Comprehensive ignore patterns
  * Python artifacts (__pycache__, venv, .env)
  * Node.js artifacts (node_modules, dist)
  * IDE configurations (.vscode, .idea)
  * OS files (.DS_Store)
  * Cloned repositories (backend/repos/)
  * Build outputs and coverage reports

Security: Prevents accidental commit of API keys and sensitive data

Author: DevanshuNEU

.env.example

@@ -0,0 +1,24 @@
+# CodeIntel Environment Variables
+# Copy this to .env and fill in your actual values
+
+# OpenAI API (Required)
+# Get from: https://platform.openai.com/api-keys
+OPENAI_API_KEY=sk-...
+
+# Pinecone API (Required)  
+# Get from: https://app.pinecone.io/
+PINECONE_API_KEY=pcsk_...
+PINECONE_INDEX_NAME=codeintel
+
+# Supabase (Required)
+# Get from: https://app.supabase.com/project/_/settings/api
+SUPABASE_URL=https://your-project.supabase.co
+SUPABASE_KEY=eyJ...
+
+# Backend API
+API_KEY=change-this-secret-key-for-production
+BACKEND_API_URL=http://backend:8000
+
+# Redis (auto-configured in Docker, set REDIS_URL in Railway)
+REDIS_HOST=redis
+REDIS_PORT=6379

.gitignore

@@ -0,0 +1,32 @@
+# Python
+__pycache__/
+*.pyc
+venv/
+env/
+
+# Node
+node_modules/
+dist/
+
+# Environment
+.env
+.env.local
+backend/.env
+backend/.env.local
+mcp-server/.env
+mcp-server/.env.local
+
+# IDE
+.vscode/
+.idea/
+*.swp
+
+# OS
+.DS_Store
+
+# Cloned repos
+backend/repos/
+!backend/repos/.gitkeep
+
+# MCP Server
+mcp-server/__pycache__/