Release v0.1 (Alpha)

Initial public release of the spfcheck.io app.

Working:

• Front-end API submission
• Front-end input validation (basic)
• Front-end DOM manipulation with result
• Backend input validation within Lambda
• Backend SPF record check as boolean

Todo:

• Add 'about' page and fix header hyperlinks.
• Implement OpenAPI with regex pattern match input validation for API Gateway
• Implement rate limiting
• Implement return of raw SPF record