Enhance README and RPC for package management

- Added instructions to README.md for building an ISO from source and flashing it to USB.
- Introduced a new RPC method for package installation, including security checks and container management.
- Updated Docker and Podman integration in build scripts to support both container runtimes.
- Enhanced Nginx configuration for improved timeout settings and WebSocket support.
- Added new app metadata for additional applications in the Docker package scanner.

neode-ui/src/utils/dummyApps.ts

@@ -335,7 +335,7 @@ export const dummyApps: Record<string, PackageDataEntry> = {
     'static-files': {
       license: 'MIT',
       instructions: 'Local AI model runner',
-      icon: '/assets/img/ollama.webp'
+      icon: '/assets/img/app-icons/ollama.png'
     },
     manifest: {
       id: 'ollama',