feature: Add local host variable

[Alex-0293]

Overview

Show wrong service path in service description after compose generation

Current State:

Generated file: compose.yaml
Generated file: assets/config.yml
 Template generated successfully in 'homer'

Next Steps:

1. Start the Homer dashboard:
   docker compose up -d

2. Customize your dashboard:

   • Edit assets/config.yml to add your services
   • Organize services into groups (Applications, Monitoring, etc.)
   • Add links to the navbar for quick access

3. Optional: Add a logo:

   • Place your logo.png file in the assets/ directory
   • Or update the logo path in assets/config.yml
   • Supported formats: PNG, SVG, JPG

4. Optional: Customize the theme:

   • Uncomment and modify the colors section in config.yml
   • Available themes: default, sui
   • See documentation for advanced theming options

5. Access your dashboard:

   • Open http://localhost:8080 in your browser

Impact:

Open http://localhost:8080 in your browser
localhost is inaccessible path on remote client

Solution:
create variable "hostname" and define it in general settings with FQDN or IP

[ChristianLempa]

I think the issue is with the next steps description, not necessarily with the need for a hostname or fqdn. There's already a container_hostname variable in the schema, but this is not used by all templates.

[Alex-0293]

The main goal, is to generate link to service (http://{FQDN}:8080/) with universal access. In case when you are using this service from other machine it`s not possible to copy paste link to the browser without modification.

[ChristianLempa]

It needs to be in line with the traefik_host variable. Depending on whether Traefik is enabled or not, this will change. However, it would be possible to deprecate the traefik_host variable and use a more general external_hostname or external_fqdn, which could be used to generate the link AND the traefik host rule... what do you think?