I'm trying to implement Onesignal push notifications, I'm told to enter the following code on my site: <Head> <Link rel = "manifest" href = "/ manifest.json"> <Script src = "https://cdn.onesignal.com/sdks/OneSignalSDK.js" async> </ script> <Script> Var OneSignal = window.OneSignal || []; OneSignal.push (["init", { AppId: "YOUR_APP_ID", AutoRegister: false, NotifyButton: { Enable: true / * Set to false to hide * / } }]); </ Script> </ Head> Where should I put this code? If anyone can help me, thanks a lot.