ADDED: Docker functionality: docker-compose.yml, docker-entrypoint, Dockerfile

Added: Env example: .env.example
Changed: More functionality for Docker: requirements.txt

.env.example

@@ -0,0 +1,4 @@
+DB_TYPE=sqlite
+SQLITE_PATH=databases/chatbot.db
+FLASK_DEBUG=true
+FLASK_SECRET_KEY=change-this-in-productio

Dockerfile

@@ -0,0 +1,60 @@
+# Use Python 3.11 slim image for smaller size
+FROM python:3.11-slim
+
+# Set maintainer
+LABEL maintainer="your-email@example.com"
+LABEL description="PY_ChatBot - Modern Flask-based Chatbot Application"
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONUNBUFFERED=1 \
+    FLASK_APP=main.py \
+    FLASK_ENV=production \
+    PIP_NO_CACHE_DIR=1 \
+    PIP_DISABLE_PIP_VERSION_CHECK=1
+
+# Set work directory
+WORKDIR /app
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    gcc \
+    sqlite3 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create non-root user for security
+RUN addgroup --system --gid 1001 chatbot && \
+    adduser --system --uid 1001 --gid 1001 --no-create-home --disabled-password chatbot
+
+# Copy requirements first for better Docker layer caching
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create necessary directories and set permissions
+RUN mkdir -p /app/databases /app/logs /app/static && \
+    chown -R chatbot:chatbot /app
+
+# Copy entrypoint script
+COPY docker-entrypoint.sh /usr/local/bin/
+RUN chmod +x /usr/local/bin/docker-entrypoint.sh
+
+# Switch to non-root user
+USER chatbot
+
+# Expose port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
+    CMD curl -f http://localhost:8080/ || exit 1
+
+# Set entrypoint
+ENTRYPOINT ["docker-entrypoint.sh"]
+
+# Default command
+CMD ["python", "main.py"]

docker-compose.yml

@@ -0,0 +1,68 @@
+services:
+  # Main ChatBot Application
+  chatbot:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: py_chatbot
+    restart: unless-stopped
+    ports:
+      - "8080:8080"
+    environment:
+      # Database Configuration
+      - DB_TYPE=sqlite
+      - SQLITE_PATH=/app/data/chatbot.db
+
+      # Flask Configuration
+      - FLASK_HOST=0.0.0.0
+      - FLASK_PORT=8080
+      - FLASK_DEBUG=false
+      - FLASK_SECRET_KEY=your-super-secret-key-change-this-in-production
+
+      # Session Configuration
+      - SESSION_LIFETIME_HOURS=24
+      - SESSION_COOKIE_SECURE=false
+      - SESSION_COOKIE_HTTPONLY=true
+    volumes:
+      # Persist database and logs
+      - chatbot_data:/app/data
+      - chatbot_logs:/app/logs
+    networks:
+      - chatbot_network
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+
+  # Optional: PostgreSQL Database (for production)
+  #postgres:
+  #  image: postgres:15-alpine
+  #  container_name: py_chatbot_postgres
+  #  restart: unless-stopped
+  #  environment:
+  #    - POSTGRES_DB=chatbot
+  #    - POSTGRES_USER=chatbot_user
+  #    - POSTGRES_PASSWORD=secure_password_change_this
+  #  volumes:
+  #    - postgres_data:/var/lib/postgresql/data
+  #    - ./init.sql:/docker-entrypoint-initdb.d/init.sql:ro
+  #  networks:
+  #    - chatbot_network
+  #  profiles:
+  #    - postgres
+
+# Named Volumes
+volumes:
+  chatbot_data:
+    driver: local
+  chatbot_logs:
+    driver: local
+  #postgres_data:
+  #  driver: local
+
+# Networks
+networks:
+  chatbot_network:
+    driver: bridge

docker-entrypoint

@@ -0,0 +1,52 @@
+#!/bin/bash
+set -e
+
+echo "🤖 Starting PY_ChatBot..."
+
+# Create directories if they don't exist
+mkdir -p /app/databases /app/logs
+
+# Set default environment variables if not provided
+export DB_TYPE=${DB_TYPE:-sqlite}
+export SQLITE_PATH=${SQLITE_PATH:-databases/chatbot.db}
+export FLASK_HOST=${FLASK_HOST:-0.0.0.0}
+export FLASK_PORT=${FLASK_PORT:-8080}
+export FLASK_DEBUG=${FLASK_DEBUG:-false}
+
+# Generate a random secret key if not provided
+if [ -z "$FLASK_SECRET_KEY" ]; then
+    export FLASK_SECRET_KEY=$(python -c "import secrets; print(secrets.token_hex(32))")
+    echo "⚠️  Generated random secret key. Set FLASK_SECRET_KEY environment variable for production!"
+fi
+
+# Initialize database if it doesn't exist
+if [ "$DB_TYPE" = "sqlite" ] && [ ! -f "$SQLITE_PATH" ]; then
+    echo "📦 Initializing SQLite database at $SQLITE_PATH..."
+    python -c "
+import sys
+sys.path.append('/app')
+from config.database import DatabaseConfig
+from database import get_database
+
+try:
+    db_config = DatabaseConfig()
+    db_type, config = db_config.get_database_config()
+    database = get_database(db_type, config)
+    print('✅ Database initialized successfully!')
+    database.disconnect()
+except Exception as e:
+    print(f'❌ Database initialization failed: {e}')
+    sys.exit(1)
+"
+fi
+
+# Print configuration info
+echo "📋 Configuration:"
+echo "   - Database Type: $DB_TYPE"
+echo "   - Database Path: $SQLITE_PATH"
+echo "   - Flask Host: $FLASK_HOST"
+echo "   - Flask Port: $FLASK_PORT"
+echo "   - Debug Mode: $FLASK_DEBUG"
+
+# Execute the command
+exec "$@"

requirements.txt

@@ -1,2 +1,36 @@
-flask
+# Requirements for PY_ChatBot
-python-dotenv
+# Core Framework
+Flask>=2.3.0,<3.0.0
+Werkzeug>=2.3.0,<3.0.0
+
+# Database & ORM (Optional for future expansion)
+SQLAlchemy>=2.0.0,<3.0.0
+
+# Environment & Configuration
+python-dotenv>=1.0.0
+
+# Security & Authentication
+bcrypt>=4.0.0
+
+# HTTP Client (for health checks and external APIs)
+requests>=2.31.0
+
+# Date/Time utilities
+python-dateutil>=2.8.0
+
+# Development Dependencies (commented out for production)
+# pytest>=7.4.0
+# pytest-flask>=1.2.0
+# pytest-cov>=4.1.0
+# black>=23.7.0
+# flake8>=6.0.0
+# mypy>=1.5.0
+
+# Production WSGI Server
+gunicorn>=21.2.0
+
+# Logging
+colorlog>=6.7.0
+
+# Utility
+click>=8.1.0