fix(docs): enhance server configuration instructions for FAssets back…

…end and frontend removing nginx

docs/fassets/guides/1-deploy-fassets-agent.mdx

@@ -179,9 +179,26 @@ You can obtain the `xrp_rpc` for the XRP Ledger, `btc_rpc` for Bitcoin, and `dog
 
 ## Configure the Server
 
-:::danger
+To access the FAssets admin interface, you need to configure the server to route requests to the frontend and backend.
 
-When configuring the NGINX server for FAssets, ensure all **security measures** are implemented to safeguard your system. Exposing the FAssets backend can lead to severe vulnerabilities.
+### Backend Configuration
+
+Allow your server to access the URL `fasset-backend`:
+
+1.	Route requests from `/fasset-backend` to the backend service (default port `4000`).
+2.	Rewrite the path from `/fasset-backend/` to `/api/`.
+3.	Forward necessary headers to the backend for proper communication.
+
+### Frontend Configuration
+
+Route requests from the frontend to the backend service:
+
+1.	Route requests from `/` path to the frontend service running on the desired port (default port `3000`).
+2.	Forward the Host header to the frontend service for proper handling.
+
+:::warning
+
+When configuring the server for FAssets, ensure all **security measures** are implemented to safeguard your system. Exposing the FAssets backend can lead to severe vulnerabilities.
 
 - **Never expose the FAssets agent interface (`/fasset-backend`) to the public network**.
 - As a rule of thumb, restrict access to the backend **only** within the local network.
@@ -190,21 +207,6 @@ When configuring the NGINX server for FAssets, ensure all **security measures**
 
 :::
 
-Set up the FAssets backend and frontend access by configuring the NGINX server.
-
-```plaintext
-location /fasset-backend { # use BACKEND_URL
-   rewrite /fasset-backend/(.*) /api/$1  break;
-   proxy_set_header Host $http_host;
-   proxy_pass         http://localhost:4000; # use BACKEND_PORT
-}
-
-location / { # use FRONTEND_URL
-   proxy_set_header Host $http_host;
-   proxy_pass         http://localhost:3000; # use FRONTEND_PORT
-}
-```
-
 ## Start the FAssets Agent
 
 Start the FAssets agent using the Docker infrastructure by running the following command: