Fix CORS configuration for frontend access

- Set allow_credentials=False when using wildcard origins
- Added explicit OPTIONS handler for preflight requests
- Simplified CORS configuration to be more permissive
- This should resolve CORS blocking from frontend applications

main.py

@@ -37,9 +37,10 @@ app = FastAPI(
 app.add_middleware(
     CORSMiddleware,
     allow_origins=["*"],
-    allow_credentials=True,
-    allow_methods=["*"],
+    allow_credentials=False,  # Must be False when using wildcard origins
+    allow_methods=["GET", "POST", "PUT", "DELETE", "OPTIONS"],
     allow_headers=["*"],
+    expose_headers=["*"],
 )
 
 # Include routers
@@ -62,6 +63,12 @@ async def health_check():
     return {"status": "healthy", "service": "uptime-monitoring-api"}
 
 
+@app.options("/{path:path}")
+async def options_handler():
+    """Handle preflight OPTIONS requests"""
+    return {"message": "OK"}
+
+
 if __name__ == "__main__":
     import uvicorn