chr 96 implementfix backend cors configuration

[christoff-linde]

Description

This adds basic CORS functionality. For now, all origins are allowed, but this will be updated and configured to use a env variable later as the project evolves.

This pull request includes several updates and improvements to the project. The most important changes include setting the GIN_MODE to release in the Dockerfile, adding CORS support in the HTTP server, and updating dependencies in the go.mod file.

Dockerfile changes:

• Set GIN_MODE to release to optimize the performance of the Gin web framework in production.

HTTP server improvements:

• Added CORS support using the gin-contrib/cors package to handle cross-origin requests.

Dependency updates:

• Updated multiple dependencies in the go.mod file, including github.com/bytedance/sonic, github.com/gabriel-vasile/mimetype, github.com/go-playground/validator/v10, and others to their latest versions.

Changelist

• feat(http): add cors package & config
• chore: vendor packages
• feat(dockerfile): ensure image is built using golang release mode

[linear]

CHR-96 Implement/fix backend CORS configuration