Add configuration template files (.env.example, .dockerignore)

Added essential configuration templates that were missing from the
repository due to overly restrictive .gitignore patterns.

Changes to .gitignore:
- Added negation patterns for .env.example files
- Added negation patterns for .dockerignore files
- These are safe template files with placeholder values

Files added:
- .env.example (root): Main environment configuration template
- reports-app/backend/.env.example: Backend configuration template
- reports-app/frontend/.env.example: Frontend configuration template
- reports-app/telegram-bot/.env.example: Telegram bot config template
- reports-app/telegram-bot/.dockerignore: Docker build exclusions

These template files help developers quickly set up their local
development environment by copying and customizing them.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

reports-app/telegram-bot/.env.example

@@ -0,0 +1,76 @@
+# ============================================================================
+# ROA2WEB Telegram Bot - Environment Configuration
+# ============================================================================
+# Copy this file to .env and fill in your actual values
+# IMPORTANT: Never commit .env file to git!
+
+# ============================================================================
+# REQUIRED CONFIGURATION
+# ============================================================================
+
+# Telegram Bot Configuration
+# Obtain from @BotFather on Telegram
+TELEGRAM_BOT_TOKEN=your_bot_token_here
+
+# Claude Authentication Configuration
+# ============================================================================
+# You have TWO options for Claude authentication:
+#
+# OPTION 1: API Key (pay per token - requires API credits)
+# - Get API key from: https://console.anthropic.com/
+# - Set CLAUDE_API_KEY below
+# - You will be charged per API usage (separate from Claude subscription)
+#
+# OPTION 2: Claude Pro/Max Subscription (RECOMMENDED if you have subscription)
+# - If you have Claude Pro or Claude Max subscription
+# - Run: claude-code login (one-time setup)
+# - Leave CLAUDE_API_KEY empty or commented out
+# - You won't pay extra API credits (uses your existing subscription)
+#
+# For development/local usage: Use Option 2 if you have subscription
+# For Docker/production: Use Option 1 (API key is simpler in containers)
+# ============================================================================
+
+# OPTION 1: Set this if using API key
+CLAUDE_API_KEY=
+
+# OPTION 2: Leave empty and run "claude-code login" before starting bot
+
+# Backend API URL
+# Development: http://localhost:8001
+# Docker: http://roa-backend:8000
+BACKEND_URL=http://roa-backend:8000
+
+# ============================================================================
+# DATABASE CONFIGURATION
+# ============================================================================
+
+# SQLite Database Path (STANDALONE)
+# This is where user data, auth codes, and sessions are stored
+# Development: ./data/telegram_bot.db
+# Docker: /app/data/telegram_bot.db
+SQLITE_DB_PATH=/app/data/telegram_bot.db
+
+# ============================================================================
+# NETWORKING CONFIGURATION
+# ============================================================================
+
+# Internal API Port (for backend to call telegram-bot)
+# This port is used by the backend to save auth codes
+INTERNAL_API_PORT=8002
+
+# ============================================================================
+# OPTIONAL CONFIGURATION
+# ============================================================================
+
+# Logging Level
+# Options: DEBUG, INFO, WARNING, ERROR, CRITICAL
+LOG_LEVEL=INFO
+
+# Sentry DSN for error monitoring (optional)
+# Get from: https://sentry.io/
+SENTRY_DSN=
+
+# Environment
+# Options: development, production
+ENVIRONMENT=production