ability to set secrets and config file mode

[WnP]

Is your feature request related to a problem? Please describe.

Some services configs or secrets require special file mode, but at the moment we are unable to configure them using Portainer UI.

Describe the solution you'd like

It would be nice if we can configure configs and secrets file mode through Portainer UI directly.

Describe alternatives you've considered

At the moment the only way to do that is through the yaml stack file editor, but this file is not updated when updating other stack parameters through Portainer UI which can leads to some stack configuration lost when updating the stack using the stack file editor.

I will be happy to help on this feature and eventualy create a pull request for that.

Let me know if there's already some works done on that feature, or if you already hits some difficulty to implement it.

Thanks

[deviantony]

Hi @WnP

Feel free to open a PR for this.