feat: Rewrite to golang

I have found a nice lib in go to handle XML so I migrate to it.
Go is ages easier to deploy then python.

fix: Update url

fix: Add .gitignore to keep git clean

feat: Move to flask

In my current setup flask is easier to deploy.
FastAPI has not yet hit alpine repositories, and I don't want to
maintain it myself.

Also flask should be more than enough to handle those requests.

feat: Move archive folder

feat: Adiciona tag opcionalmente

Agora para ativar a tag no metadata e preciso passar um _query param_
`tag=true`.

ref: Add build to publish the readme file

I use `index.html` in another places.

fix: Mexe com o metadata

Messes with metadata to try make some clients detect my feed as a
diferente one.

fix: Ajusta a parta de destino no servidor

feat: Adiocina processo na pipeline para gerar rpm

Esse vai ser a forma padrao de dar deploy no `gabrielgio.me`.

fix: Atualiza o titulo do README.md

fix: Atualiza .gitlab-ci.yml

fix: Atualiza o nome da branch

fix: Atualiza .gitlab-ci.yml file

feat: Adiciona documentacao

Adiciona Nerdtech e Generacast como filtros

Adiciona support para HEAD metodo

Adiciona projeto inicial