Custom component for checkbox input tag in react.
src/final.js - contains the final summarized feature showcase of the components
src/checkbox.js - contains the checkbox component
loaclhost:3000/ -> route for the final component
localhost:3000/check -> test route for the checkbox component
the value of the checkbox can be obtained in the / route in the console
Disabled: true / false
Checked: true / false
Handlecheckbox: accepts a function that can get back the checked value of the checkbox component