Backend API's to be converted into express

[sridhar02]

• /user/signup - POST
• /user/sign_in - POST
• /login - DELTE
• /products - GET
• /user - PUT
• /cart - POST
• /cart - GET
• /orders - POST
• /orders - GET

[sridhar02]

• Have to look for query builders to make the put user update api