feat-deploy-to-azion

[VitorAEltz]

Description

This PR adds documentation for deploying applications to Azion using the Gatsby Boilerplate. The documentation includes prerequisites, deployment steps, and additional resources.

Documentation

• The new documentation is added in docs/docs/how-to/previews-deploys-hosting/deploying-to-azion.md.
• It covers the following:
  • Prerequisites for using the Gatsby Boilerplate with Azion.
  • Step-by-step deployment instructions.
  • Additional resources for managing and deploying with Azion.

Tests

• No code changes were made, so no tests were added.

Related Issues

• This PR is related to the feature request for deploying to Azion.
• No specific issue is fixed by this PR.