### Description of the change
The init container for gpg key import doesn´t work. There is a not a tty error.
### Benefits
This will run gpg in batch mode. Eliminating the tty error.
### Possible drawbacks
None that I can think off.
### Applicable issues
- fixes#370
### Checklist
- [X] Parameters are documented in the `values.yaml` and added to the `README.md` using [readme-generator-for-helm](https://github.com/bitnami-labs/readme-generator-for-helm)
- [X] Breaking changes are documented in the `README.md`
Co-authored-by: Jeroen Verhoeven <jeroen@joentje.org>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/371
Reviewed-by: techknowlogick <techknowlogick@gitea.io>
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: dajoen74 <dajoen74@noreply.gitea.io>
Co-committed-by: dajoen74 <dajoen74@noreply.gitea.io>
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