Migrate deployment to new Netlify site

[thekaveman]

After #111 is merged and the site is redeployed to Netlify:

• Update .github/workflows/deploy.yml: Chore: migrate to Netlify #113
  • Remove on.push (this will only be triggered on.workflow_dispatch)
  • Remove write permissions
  • Remove concurrency
  • Update job to build and deploy with Netlify CLI
• Remove CNAME file Chore: migrate to Netlify #113
• Disable GitHub pages in Settings > Pages
• Remove existing DNS A records for GitHub Pages
• Add DNS CNAME records for Netlify site (proxying should be on):

@ CNAME data-donuts.netlify.app
www CNAME data-donuts.netlify.app