Docker buid issue

Machine-Backend/wait_for_db.py

@@ -0,0 +1,38 @@
+import time
+import sys
+import os
+from sqlalchemy import create_engine
+from sqlalchemy.exc import OperationalError
+
+def wait_for_db(max_retries=30, retry_delay=2):
+    """Wait for database to be ready"""
+    
+    mysql_host = os.getenv('MYSQL_HOST', 'db')
+    mysql_user = os.getenv('MYSQL_USER', 'vendinguser')
+    mysql_password = os.getenv('MYSQL_PASSWORD', 'vendingpass')
+    mysql_db = os.getenv('MYSQL_DATABASE', 'vending')
+    
+    db_uri = f'mysql+pymysql://{mysql_user}:{mysql_password}@{mysql_host}:3306/{mysql_db}'
+    
+    print(f"⏳ Waiting for MySQL at {mysql_host}:3306...")
+    
+    for attempt in range(1, max_retries + 1):
+        try:
+            engine = create_engine(db_uri)
+            connection = engine.connect()
+            connection.close()
+            print("✓ MySQL is ready!")
+            return True
+        except OperationalError as e:
+            if attempt < max_retries:
+                print(f"Waiting for MySQL... (attempt {attempt}/{max_retries})")
+                time.sleep(retry_delay)
+            else:
+                print(f"❌ Failed to connect to MySQL after {max_retries} attempts")
+                print(f"Error: {e}")
+                sys.exit(1)
+    
+    return False
+
+if __name__ == '__main__':
+    wait_for_db()