Update app.py

app.py

@@ -1,11 +1,14 @@
 from flask import Flask, render_template, jsonify, request
 import json
 import random
+import os
 
 app = Flask(__name__)
 
 # Load coins from JSON file
 def load_coins():
+    if not os.path.exists('coins.json'):
+        return [{"id": 1, "color": "#CD7F32", "price": 0, "value": 0.10, "winrate": 0.50}]
     with open('coins.json', 'r') as f:
         return json.load(f)