added contact.html backend with hCaptcha

[Anirban-1490]

Added backend for contact page

• JWOC Participant (not registered on JWOC site :( )
• Contributor

Closes: #37

Describe the changes you've made

Made backend for Contact page (contact.html) using FromSubmit API and hCaptcha.
Also added custom styling if captcha has not been done but user has pressed the submit button.
Also fixed CORS error for POST request on hCaptcha endpoint

Type of change

What sort of change have you made:

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, local variables)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Tested with my own email address and after form submit emails are coming :)

Checklist:

Example how to mark a checkbox:-

• My code follows the guidelines of this project.
• I have performed a self-review of my own code.
• I have commented my code, particularly wherever it was hard to understand.
• I have made corresponding changes to the documentation.
• My changes generate no new warnings.
• I have added tests that prove my fix is effective or that my feature works.
• Any dependent changes have been merged and published in downstream modules.

Screenshots

[prathimacode-hub]

PR approved. Welcome to repo officially. Glad to see your initiation to take up this issue. Great start it was. 👏🎉@Anirban-1490

[Anirban-1490]

PR approved. Welcome to repo officially. Glad to see your initiation to take up this issue. Great start it was. 👏🎉@Anirban-1490

Thank you :)