[FEATURE] Save and add headers to Web assets

[joamla96]

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

Non-public grafana dashboards and be opened using service accounts, and static authorization headers.
This avoids having to make the dashboard fully public.

Describe the solution you'd like

A way to add headers to web assets, such as an "Authorization" header.

Describe alternatives you've considered

Public dashboards in Grafana, but these have issues in our setup due to some variables in the datasources

Would you be willing to contribute to this feature?

I'd love to, but not sure how to get started, and setting up a testing environment where i could quickly deploy and debug.

[vpetersson]

We already have this support in Screenly, but not in Anthias.

TLDR is that the browser needs to be modified to allow injection of headers. It's technically possible, but would require modifications to how we launch the browser (and possibly new compilation options). @nicomiguelino would probably know in detail.

[nicomiguelino]

Thanks for creating a feature request. Aside from Qt/C++ code changes, changes to the web app (for both front-end and back-end) will be made as well.