app.py

from flask import Flask, render_template, send_from_directory
import os

app = Flask(__name__, static_folder='static')

@app.route('/')
def index():
    return render_template('index.html')

@app.errorhandler(404)
def page_not_found(e):
    return render_template('index.html'), 404

@app.errorhandler(500)
def internal_server_error(e):
    return "Internal Server Error: " + str(e), 500

# Explicitly serve static files if needed (usually handled by Flask automatically, 
# but good for explicit control in some environments)
@app.route('/static/<path:path>')
def send_static(path):
    return send_from_directory('static', path)

if __name__ == '__main__':
    port = int(os.environ.get('PORT', 7860))
    app.run(debug=True, host='0.0.0.0', port=port)