feat(script): add tailscale

[AeroXuk]

Introduce a new installation script for Tailscale, including configuration options and requirements. Update documentation to reflect the addition.

This is based on the Custom Install Script found at https://hub.hexos.com/topic/4267-trial-tailscale-custom-install/.

I've editted and validated the install script against the TrueNAS app schema.

The following changes were made to the version from the forum:

• Removed default values for questions.
• Used the TrueNAS app schema descriptions in the installation_questions descriptions.
• Added application state directory to ensure_directories_exists.
• Added accept_routes to app_values with the default value from the truenas app schema.
• Reduced resource limits after observing the app running.

[SimJoSt]

Tested it, without reading the code itself.
It worked, after I finally read the hostname character requirements.

It's unfortunate, that it's not possible to validate the validity of the hostname string in a better way. If something incompatible is entered, it just fails without clear feedback. That could trip up non-technical users.

[SimJoSt]

Are you considering adding more question for the remaining options, like exit node mode?

[AeroXuk]

Are you considering adding more question for the remaining options, like exit node mode?

I did initially do this in the first version I wrote before cutting it back.

It would be good to get a HexOS devs response on what they think is the right approach. Expose every option or only the most likely ones?

[SimJoSt]

Chatting with https://hub.hexos.com/profile/1358-mobius/, the opinions seems to be to remove all unnecessary choices, if they don't strongly change the features. Like a selection between different database version images.
I think the exit node feature is worth exposing to the user. Personally. But I also feel comfortable working in the TrueNAS UI :D

[acknologia]

Hi AeroXuk,

I appreciate you helping us by creating installation scripts. I am going the be messaging you on the HexOS hub and hopefully i can help answer any questions you may have.