feat: add custom branding, air-gapped deployment script, and updated self-hosting docs

simple-index.html

@@ -56,12 +56,14 @@
         <div class="flex justify-start items-center h-16">
           <div class="flex-shrink-0 flex items-center cursor-pointer">
             <img
-              src="/images/favicon-no-bg.svg"
-              alt="Bento PDF Logo"
+              src="{{baseUrl}}{{#if brandLogo}}{{brandLogo}}{{else}}images/favicon-no-bg.svg{{/if}}"
+              alt="{{#if brandName}}{{brandName}}{{else}}Bento PDF{{/if}} Logo"
               class="h-8 w-8"
             />
             <span class="text-white font-bold text-xl ml-2">
-              <a href="/">BentoPDF</a>
+              <a href="/"
+                >{{#if brandName}}{{brandName}}{{else}}BentoPDF{{/if}}</a
+              >
             </span>
           </div>
         </div>
@@ -460,14 +462,17 @@
           <div>
             <div class="flex items-center mb-2">
               <img
-                src="/images/favicon.svg"
-                alt="Bento PDF Logo"
+                src="{{baseUrl}}{{#if brandLogo}}{{brandLogo}}{{else}}images/favicon.svg{{/if}}"
+                alt="{{#if brandName}}{{brandName}}{{else}}Bento PDF{{/if}} Logo"
                 class="h-8 w-8 mr-2"
               />
-              <span class="text-white font-bold text-lg">BentoPDF</span>
+              <span class="text-white font-bold text-lg"
+                >{{#if brandName}}{{brandName}}{{else}}BentoPDF{{/if}}</span
+              >
             </div>
             <p class="text-gray-400 text-sm">
-              &copy; 2026 BentoPDF. All rights reserved.
+              {{#if footerText}}{{footerText}}{{else}}&copy; 2026 BentoPDF. All
+              rights reserved.{{/if}}
             </p>
             <p class="text-gray-500 text-xs mt-2">
               Version <span id="app-version-simple"></span>