backend .env variable:
JWT_SECRET=
DATABASE='paste ur Database url
//https://www.paypal.com/signin PAYPAL_CLIENT_ID=
//https://console.cloud.google.com/apis/credentials?pli=1&project=foodapp-347802 GOOGLE_API_KEY=
//https://cloudinary.com/users/login CLOUDINARY_CLOUD_NAME= CLOUDINARY_API_KEY= CLOUDINARY_URL= CLOUDINARY_API_SECRET=
//mailgun MAILGUN_DOMIAN= MAILGUN_API_KEY= ....