Revise BUILD-GUIDE and enhance ISO build process

- Updated BUILD-GUIDE.md to streamline instructions for building the Archipelago Auto-Installer ISO, including prerequisites and post-installation steps.
- Added detailed sections on capturing the live server state and building from source.
- Enhanced Docker and Podman integration in build scripts for improved backend and web UI capture.
- Introduced new app metadata for "IndeedHub" in the Docker package scanner and updated UI components for better installation progress tracking.
- Improved styling and functionality in the Bitcoin UI for a more cohesive user experience.

docker/bitcoin-ui/nginx.conf

@@ -0,0 +1,28 @@
+server {
+    listen 8334;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Bitcoin RPC proxy to avoid CORS issues
+    location /bitcoin-rpc/ {
+        # Proxy to localhost Bitcoin RPC (using host network mode)
+        proxy_pass http://127.0.0.1:8332/;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header Authorization "Basic YXJjaGlwZWxhZ286YXJjaGlwZWxhZ28xMjM=";
+        add_header Access-Control-Allow-Origin *;
+        add_header Access-Control-Allow-Methods "POST, GET, OPTIONS";
+        add_header Access-Control-Allow-Headers "Content-Type, Authorization";
+        if ($request_method = OPTIONS) {
+            return 204;
+        }
+    }
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}