docs: add GitLab links and Docker Hub compose images

docs-site/astro.config.mjs

@@ -16,6 +16,7 @@ export default defineConfig({
             { label: 'Демо', href: '/demo/home' },
             { label: 'Установка', href: '/getting-started/setup/' },
             { label: 'GitHub', href: 'https://github.com/3252a8/remnawave-minishop' },
+            { label: 'GitLab', href: 'https://gitlab.com/3252a8/remnawave-minishop' },
             { label: 'Telegram', href: 'https://t.me/remnawave_minishop' }
           ],
         }),

docs-site/src/components/Header.astro

@@ -46,6 +46,9 @@ function navIcon(href: string) {
   if (href.includes('github.com/3252a8/remnawave-minishop')) {
     return 'github'
   }
+  if (href.includes('gitlab.com/3252a8/remnawave-minishop')) {
+    return 'gitlab'
+  }
   if (href.includes('t.me/remnawave_minishop')) {
     return 'telegram'
   }