Add base-path deployment support

README.md

@@ -21,6 +21,14 @@ Open:
 http://localhost:5173
 ```
 
+To serve under a subfolder like `https://domain.com/folder`, set:
+
+```bash
+DOCLINK_BASE_PATH=/folder npm start
+```
+
+That makes internal links, HTMX requests, and redirects stay under the same folder.
+
 ## Click To Run
 
 If you want a one-click launcher on macOS/Linux:
@@ -55,6 +63,7 @@ If you run the server in the foreground, stop it with `Ctrl+C`.
 - If the upstream login rejects the credentials or is unavailable, demo mode creates a local session so the UI can still be exercised.
 - Order search, order detail helpers, FPP loading, password change, and special message save are wired through the API adapter with mock fallback for local preview.
 - `start.sh` writes a pid file named `.doclink-web.pid` and a log file named `doclink-web.log`.
+- Deployment templates are in `deploy/`.
 
 ## Main Files