Update README and API for Docker integration and app management

- Revised README.md to clarify the use of Docker alongside Podman for containerization.
- Updated API documentation to reflect new RPC endpoints, including `auth.logout`.
- Enhanced WebSocket handling in the API for better connection management.
- Modified Neode UI to utilize a curated list of Docker-based applications, replacing previous Start9 registry calls.
- Improved error handling and logging in the marketplace for better user experience.

core/archipelago/src/api/rpc.rs

@@ -72,6 +72,7 @@ impl RpcHandler {
             "echo" => self.handle_echo(rpc_req.params).await,
             "server.echo" => self.handle_echo(rpc_req.params).await,
             "auth.login" => self.handle_auth_login(rpc_req.params).await,
+            "auth.logout" => self.handle_auth_logout().await,
             "container-install" => self.handle_container_install(rpc_req.params).await,
             "container-start" => self.handle_container_start(rpc_req.params).await,
             "container-stop" => self.handle_container_stop(rpc_req.params).await,
@@ -152,6 +153,14 @@ impl RpcHandler {
         Ok(serde_json::Value::Null)
     }
 
+    async fn handle_auth_logout(&self) -> Result<serde_json::Value> {
+        // For now, just return success. In a full implementation, this would:
+        // - Invalidate session tokens
+        // - Clear cookies (if we were managing them)
+        // - Close authenticated WebSocket connections
+        Ok(serde_json::Value::Null)
+    }
+
     async fn handle_container_install(
         &self,
         params: Option<serde_json::Value>,